I'm a vehicular cyclist too. "that's not your problem" is technically true but not helpful. Being able to maintain your speed uphill and avoid being overtaken is helpful.

"Just take a longer route" Sure I'll take a side street when possible to avoid a main street, but often there's no reasonable alternative to a street with cars going fast.

The things you're suggesting for bikes work on ebikes just as well. You're fit, and have the confidence that years of experience brought.

"Take the lane" is good advice but you must not be around other vehicles if you don't have cars making close passes. It makes you more visible and most drivers fully change lanes to pass but I still find drivers who won't. They'll take the edge of my lane and pass close. Being able to maintain speed can mean fewer overtakings.

It takes a lot of confidence to be a vehicular cyclist. Ebikes boost the rider's power and confidence.