Of course, no one needs two properties. I don’t need a four bedroom house for my main tesidence, either. It surely has to be about choice, As it happens, I didn’t buy my second home, I inherited it from my late mother and decided to keep it so that my own family could enjoy it and so on down the line.
I also let it out which allows many other families to enjoy the area and all it has on offer. We, and they, are supporting the local economy all the time - visitors in restaurants, pubs, hotels, shops and tourist attractions and owners employing local tradesmen, cleaners, gardeners etc.
I do agree though that in some areas, second home ownership has got out of hand, driving prices up so that youngsters can’t afford to live there. I couldn’t have afforded it either, as it happens. Meanwhile, it’s a matter of mutual respect - the local economy needs its visitors and visitors need the economy. Hopefully, we will soon get back to a summer ‘norm’.