Great thing about ebikes is being able adjust assist level to match you fitness. The idea is to use an assist level that makes riding fun, which means you will ride more and improve your fitness.I am unfit and am surrounded by some very steep hills which is why I wanted an ebike. I sailed up the steepest in sports mode with very light pedalling.
What I have noticed though, is it is harder in eco on the flat than I expected - Maybe just a lack of fitness!