I not only agree with that but might add other points.
Ride Planning
For any enthusiast e-biker, route planning is the first thing to do before any longer trip. We need to know both the planned ride distance and elevation gain to estimate the battery range; it also helps deciding whether taking a spare battery would be necessary. With mountain (or hill) riding, it is also necessary to know what the most significant inclines could be met on the ride (I know I need to take my Trance E+ for the ride whenever maximum grade is > 13.5%). Good bike route-planners will help you select adequate route for your bike type (road-bike vs MTB) as well. A good bike route planner will display available bike paths, trails, and single-tracks. It is nice that it is possible to plan alternative routes, even to learn our neighbourhood better. Of course, if somebody rides out for the same 10 miles everyday, route planning is not necessary. With trips over 25 miles, route-planning becomes a necessity.
A good route planner will even inform you on the temperature, raining, and wind direction/speed for given route on given future day and time! How one could ride out for a long trip without such knowledge!
Actually I use kind of a multi-tiered system for long-distance bike tours.
I usually start with guidebooks, online fora, and some youtube videos for inspiration. Then I start exploring with Google Maps. While Google Maps isn't the greatest tool for route planning, it is great for making rough evaluations of what a day's ride would be like: you can pretty quickly see how far it is between towns and how much elevation gain and loss, from satellite images and Street View you can get a rough gauge of how busy a road is and how good or bad the shoulder you are riding on might be. The bicycle option does a good but not great job of finding suitable cycling routes.
With Google Maps you can also size up pretty effectively where you might stay: if you are overnighting you can get a good idea of what lodging or camping is available at your destination, and also subtle things like is that lodging or camping convenient to a store or restaurant? A lot of American towns can be literally miles long and one block wide, and if all of the hotels are at one end of town and the grocery stores and Starbuck's are at the other end of town that isn't a great situation. If I am camping I personally like to grab groceries for dinner, breakfast, and possibly the next day's lunch late in the day and carry them to camp, rather than haul around a pantry all the time: better to live off the land.
To some extent I also use Google Maps to explore alternate routes: more interesting and less traveled roads, trails, and side trips.
Then the real research begins. I start making phone calls, asking questions online, and in some cases even sending a few emails. Mostly to get details about whether (e.g.) The Spruce Railroad Trail or the Willapa Hills trail is *really* open, or if a particular country store, campground, or hotel is open and if they are cyclist friendly.
At that point I can actually start planning day-to-day rides. Usually I don't plan out the whole trip, but perhaps the first couple of days. You should always plan your trip but always plan to ditch your plan, so overplanning isn't productive. I will regroup someplace with good internet and do detailed plans with rwgps every few days.
I would expect for a two week trip that it is reasonable to spend two days on planning and research.
There are things you can't really plan for, and just need to figure out. As an example, the San Juan Islands in Washington, USA are a popular cycling destination and actually are pretty well-set-up for the bike tourist. But there are some foibles that need to be worked out: while there is some pleasant and scenic camping, much of the camping doesn't have outlets available to charge your e-bike. And most of that camping is several miles from any store or town. Much of the lodging is very expensive. Worse, most lodging doesn't permit bicycles in their rooms, and there often aren't good options for securely parking your bike. And very few places have laundry. Figuring that stuff out from maps and guidebooks is tough.
One technique (well, I'm being generous calling it a technique) is what I call "Expedia Travel". I use the Expedia App on my phone not so much to make reservations but as a gauge of availability of lodging. If lots of hotels are open and lots of rooms are available I don't book a reservation, I just ride. That way if I arrive at my planned destination for the day with a few more miles in me, I'm not committed to staying there and can continue onwards.