Hey, you believe what you want. You always do. I have the "Show playtime stats" selected as well. That's for each game individually as listed on the "All Games" page. If one other person can join this thread and show their total hours without using a third party site/plugin/Opera, then I'll change my mind.
Steam does not keep track of your total hours across all games, but there are third party websites that can calculate this for you.
No need to be snarky, especially when someone is already agreeing with you.