I mean, the context I hear the advice in is “yeah, eat a healthy diet. Take a generic multivitamin if you want - you provably aren’t lacking anything, but it’ll make sure you aren’t.” For context, I hear this advice given to people who already care a lot about their diet for the sake of athletic performance.

Also, your link didn’t convince me of the above claim that you just piss out everything in a multivitamin. It didn’t mention that. It just said multivitamins don’t prevent heart attacks, which… I never thought they did.