This is why the E-Assist bike exists, the best of both worlds IMO...

One too many hills, 5 miles too far, who cares, not me. I

my E-Assist bike.
EDIT; Or time & sweat, those may actually be the two things that really put the E-Assist over the top. Twice as fast getting to where you want to go with half the sweat but still a work out at whatever level you want...