Comment by et-al

A lower speed for throttle-only sounds like a good solution!

To clarify, my original post was about non-electric bicycles, but my experience with pedal-assist ebikes [Jump (RIP) and Citibike/Baywheels] was that they were noticeably heavy and after a few blocks of pedaling really hard, I'd tire out and slow down. Perhaps you're gifted with a very high vo2max?