Interesting move... I don't completely agree with it, but it's a strong statement.
In my opinion, you don't have to delete your account on another platform to start using a new one. You can just stop using the platform (without deleting the account) and over time it will lose relevance. It's a safer bet in my opinion. Especially if you built some kind of following on YouTube, those subscribers don't come by very easy.
Nevertheless, I respect your move.