Good point for the more aggressive riders such as road racers and others whose riding position has them leaning forward. However, on the OP's LECTRIC bike as well as many more casual bikes with handlebars higher than the seat (like my Trek Verve) it seems we are actually sitting on the bike moreso than "riding" the bike. I know I am more comfortable sitting more upright than leaning forward when I am riding casually. If I were racing or climbing a hill and had to apply more pedal pressure I'd probably benefit from leaning forward and pulling against the handlebar to enable me to generate that extra pedal power. But with my e-bike I simply select a mode with more assist as needed on
how to correct posture. I'll have to try reducing the downward force to see if that might help relive some of the pressure on my butt and tailbone.