Why do books suggest depositing payout checks via an ATM?

I never deposit any kind of check via an ATM. It takes longer to post that way, and maybe I'm paranoid, but there's always a chance a check could get lost when it and other deposits are removed from the ATM every day. So I've always cashed the check at the bank it's drawn on and then gone to my bank to deposit the cash. I know it may sound like a hassle, but cash doesn't bounce and it is available instantly.

So with all that said, why would a book suggest using an ATM to deposit over depositing it in person?

For normal checks, it doesn't really matter but for checks you get from a sportsbook, the best way to deposit them is to deposit via the ATM. The less people that see the checks, the better.

Bank tellers are the nosiest box I've ever come across in my life. They always want to know everyone's business. I think it's mainly because it's been years since any of them had any person so they seem to be very uptight.