You can't take the arguments against Bitcoin (of which I mostly agree) and then apply them to all cryptocurrencies though.
Bitcoin was a first implementation and it has not evolved particularly well, but unfortunately its become synonymous with crypto and the arguments get grossly simplified, or there is willful ignorance from those who don't want to read about the alternatives that look to make it more sustainable and underpin the transactions (monetary and contractual) of whole sectors like education, agriculture, trade and insurance.
Yes there is a massive problem with Proof of Work consensus mechanisms in terms of energy efficiency and yes there is way too much hype and scamming for a majority of the crypto projects to be taken seriously. But the science is solid, and as a whole crypto is an active field of research that is being rolled out in a number of different and exciting forms.