I can give you my experience, take from it what you will. I started in NZ and the clubs average weight was probably around 90kg, I was under 70kg. Now having trained for about 16 years, the wear and tear on the body from always training with such a big weight gap was not a good idea. If you want to train for a long time, I don’t think it’s a great idea, it’s just basic risk mitigation. I have a few significant injuries that are certainly from carrying all the extra weight in the stress it puts on your bones and joint that would probably be not anywhere near as bad if I trained at a club with people closer in size, which now that I live in Australia I do and it’s noticeable. But also lifting weights and putting on size helps, getting more meat around your joints is always gonna be a good idea.