It's a divisive topic. Recently our club president quit over the possible inclusion of e-bikes on our rides, (they have been banned), and another prominent rider has also quit coming out.
The funny thing is, there are only 3 or 4 e-bikes that show up and it's rare that they do (club has over 400 members).
The main issue I see is you could have a rider who doesn't know how to ride in a group suddenly able to keep up with a fast group. On the other hand, I have a friend who now rides an e-bike after many years of group rides, so he is safe and never a problem.
As for me, I'm 63 and a little overweight and not in the shape I was even 5 years ago, but I still prefer to do all the climbs under my own power. I'm not ready for a motor yet. I won't say never, but I hope never.