Look I'm guilty of copy and pasting addresses, but the very least I do is check the first few and last few characters, then you get people like this, who treat using a wallet as a google doc

Thankfully this person only lost Ethereum, so no rot really a loss, lol but still  doesn't excuse being a max pain moron
https://cointelegraph.com/news/trader-loses-26-million-copy-paste-error-max-pain