I think pretty much everyone agrees with your take here. People are just saying that if kids are struggling and parents can afford it, it's weird for the parents not to help out financially.
Obviously the circumstances matter and if the kid is struggling because they're lazy or a drug addict you don't want to enable that but if they have their own kids and are working full time I would always support my kids financially if they needed that and I was able to.
You should probably take a look at how many hours the average young person had to work a week to pay for their education or to pay rent back then,compared to now.. The numbers I can find suggest the average college aged person had to work around 18 hours a week to pay for their own education back in 1970. Today they have to work 61 hours a week.
Saying the younger generation doesn't have it harder in most western countries is objectively wrong.