To me, it doesn't make any sense. I don't use crypto.com, but don't they have other stablecoins on the platform like USDC that traders will decide to use instead of the banned USDT?
How about all other shitcoins? Does the Ontario Securities Commission feel they are much safer than USDT?
I was wondering the exact same thing until I read what you posted (in bold). It makes complete sense and it would probably be the only reason for such an action. My only other thought is it could be some sort of deal or lobbying by those behind USDC, who are very aligned with government/corporate interests, at least in the USA.