If you work for a tech company, I can practically guarantee that it bans a lot of lawful behaviors on its platforms. Paypal bans or restricts online dating, cigarettes, and firearm accessories. Youtube demonetizes swearing. Facebook prohibits the sale of bodily fluids (I don't want to know what triggered that policy) and "used cosmetics".

If you're not interested in stuff like that when your company is doing it, but are up in arms about some other platform deciding that they don't like crypto, I think you should look in the mirror. Their reasoning is probably the same: they don't like it and don't want to put up with the task of sensibly policing the category.