yeah but that's called mental gymnastics, not opinions.
Piracy does affect sales though, people just upplay it or downplay it. It depends on a myriad of factors -- how intrusive or annoying the DRM is, how shitty the company is, how expensive the game is, etc. There's a lot of factors that will influence piracy. Likewise, piracy will affect sales if those pirates do not buy the game, however there's a significant number of pirates like myself who do buy the games if they like them.
Piracy is a complex topic that needs a complex debate that isn't just "GUYS UHHH IT DOES AFFECT IT BADLY" or "GUYS IT DOESN'T AFFECT IT AT ALL"