"Bitcoin is much older than Hardware Wallets and the wallets in the past was also super safe."

I don't know how you think this is an argument for anything, but as someone who has been using bitcoin wince 2011 and has lost keys on a desktop wallet from "before hardware wallet days" I also, very much disagree. You won't convince me otherwise. I didn't come to this conclusion because I read somebody's tweet. Its from 13 years of using, failing, trying, testing, and gaining experience in bitcoin.

You are free to do whatever you want with your bitcoin keys. Thanks for the opinion though.