Something I have found that really solves that problem for us old codgers and curmudgeons is a dropper post. I know it sounds silly on a road bike but there are gravel bikes that come fitted with them now, like the Turbo Creo. I have one on my Delite and find that I drop the saddle every time I come to a full standstill stop. If I am at a light, I am sitting in the saddle with both feet flat on the ground. At startup, I push off, stand on the pedals, push the handlebar lever and pop! the saddle is right where it belongs, sit down and go. If I am getting off the bike, with the saddle (and saddle bag) 100mm lower, it is much easier to swing your leg back over to off and same when you mount back up.