There's always going to be those who take things to far, there's addiction to pretty much everything. But, does that mean anything with addicts should be banned for everyone?
The investment argument is pretty funny to me, no one should take financial advice from anyone except experts. I remember, back in the day asking if I should put my then very limited funds into Bitcoin and being told that was stupid! It was never going to be worth more than the couple of quid it was at the time and I'd be spaffing my cash up the wall etc etc. So I didn't invest. It was a gamble I, and many others didn't take and I lost out massively. It's all gambling, whether you're talking Nvidia, Disney or any other investment. It's easy to look back with hindsight and say if something was smart or stupid.
Personally, I'm going to keep playing.