On the one hand I have no idea why you'd solicit the advice of a stranger on the internet on the matter of whether you should get an e bike, but since you did, I would ask you this: what's your plan for dealing with injury? I'm only about half your age, but I broke my leg in a silly MTB accident a few years ago. It was 6 weeks of inconvenience, but I got past it. But for seniors, such an injury can be very difficult to ever come back from, and have more long-lasting consequences if it permanently affects mobility. My current thinking is that when I'm 75, I think I'll be looking for safer ways to stay active (hiking, swimming), rather than ways to keep going fast and putting myself in harm's way. If I got an e-bike, it probably wouldn't be a road bike so much as a hybrid or fitness bike. Well, maybe in 40 more years zwift will be more like real life and I can relive my glory* days virtually.
*in reality, not so glorious