..assuring them that “funds are safu”,
There's no real SAFU, that's a part of marketing ads.
However, this isn't new for them. AFAIK, this Binance was implemented before changing the user's wallet address for safety.
I think Binance did this for their customer security, but if you're going to ask me, I'd rather store my coins in a wallet that is under my control than a centralized exchange like Binance. Don't give full trust in SAFU.