So it's about astetics and achieving this makes dispiriting boredom/wasting energy motivation enough for for some if they achieve specific ?
I disagree.
If you work your muscles hard and they reach their genetic potential or anywhere near it, then you will look better. Therefore, aesthetics are part of the equation whether you seek them or not, assuming you are not hiding those muscles under layers of unnecessary fat.
Boring? Hardly. If you work out to your very limit, that can be many things, but boring is not one of them. Besides, if you do work out to your limit, then it needs not be a long workout or even a frequent one. And the endorphin rush after the fact is totally worth it. In my opinion there are many fairly worthless exercises that have no evolutionary relevance. But systematically focusing on the few that work your major muscles as they were intended to be worked can give you a balance that other activities such as the ones you described simply cannot. And certainly not as efficiently. And they are probably your best bet to ward off age-related sarcopenia as long as possible.
When I was younger, I went to the gym 3 times a week for 2.5 hours at a time. Yeah, I was misguided, to put it mildly. It came to the point where I was no longer looking forward to going despite the cardio bunnies on display. I suppose I got good results despite the overtraining because I was young(er) and robust enough to withstand it. But it was overkill.
Presently, I work out at home first thing in the morning, for only about 30 minutes, 3 times every 2 weeks (every 4 or 5 days). It is incredibly intense, taking each set to absolute concentric failure and then resting just enough to catch my breath to properly perform the next exercise (between 45 and 75 seconds, depending on the movement). It is not boring. Testing your limits is very challenging, therefore, by definition it cannot be boring. If anything it is addictive. But if I overdid the volume and frequency, and didn't go to failure, then, yeah, it would get boring and interfere with life.
I know I said all this before, elsewhere in the forum. But it bears repeating.