puzzles don’t help you very much actually…
There are some kinds of tactical patterns that if you've never seen them before you're unlikely to find them over the board unless you are very good at calculation. Doing puzzles can help with that calculation ability, familiarize yourself with various tactical patterns so you can recognize when they are in or latent in a position, and potential decrease the time spent finding tactics overall.
Add to that, many games are won/lost on tactical ideas. It's better to familiarize yourself with as many as you can and exercise calculation than it is to not do it
You are so wrong, it is laughable.