One could argue that weight lifting in general is "useless" because it doesn't do much to build "usable strength." I've seen my deadlift and squats shoot through the roof, but moving a couch isn't much easier today than it was a year ago. It's for aesthetics and health. Benchpressing may be a useless motion in real life, but it's a very efficient motion for engaging multiple muscle groups and encouraging a positive hormonal response. And it has come in handy a few times while drinking as I have benchpressed girls on multiple occasions. It gets a funny reaction.
Don't put your trust in anyone on this forum, including me. You are the key to your own success.