It may not last forever, but I bet my research and time invested to know what lubricants to use, and which ones to avoid, will allow my engine to last twice as long as those who pour whatever they can get their hands on into their engine.
It's not stupid, gay, or whatever else you care to call it. It's called prevention. Maybe if you would do the same thing in your daily life and avoid carbonated drinks, drinking water instead....you will live longer as well.
that's the kinda person you never wanna buy a used car from cause chances are its beat to shit an never been maintained.