There’s a big difference between doing something that’s maybe not the best use of resources, but still serves a purposes, even if it’s just pleasure (ex: watching the Kardashians) and doing something for no reason that makes any sense at all.

We should all be judicious with how we use our limited resources. The market often serves to incentivize that good judgement. When the market starts incentivizing waste (e.g. “cryptocurrencies”) that’s when you need to start banning things.