I agree with the ban of crpyto related scams, and they should focus on it. However, if some legit channels are going to be affected, then they have to look at their process of banning, just saying.
Perhaps you could have seen the policies set out by YouTube itself.
One of the content policy clearly says when an allegation would be done on a channel and i guess one of the policy depicts the Crypto Channels here :
Since most of the Crypto projects fall under get quick rich stuff and also MLM kinda projects they are banned straight away.
Also this one . . .
Reference : https://support.google.com/youtube/answer/2801973?hl=en&ref_topic=9282365
About the LEGIT CHANNELS :
They always have a scope to contact the support and present their channel in best possible ways and look if they violate the terms of YouTube or Not. C'mon there is no alternative for this.