I'll admit to anyone, most of my choices have always been due to childhood dreams and the books I read as a kid. As Grand Veneur said, "childhood dream". Even now, I want a .500 Schüler, and am deciding if I should begin that project or not. I'd never use it on anything but culling boars, because I'm too old now to travel good (or at least the way I always used to) and I have to remain in the states now for my aged mother. Do I need it? No. I just want one. When I was younger and could do all these things, I chose rifles that pleased me because of history itself, nostalgia, and not because of any 'practical' standpoint. I can't carry those same rifles now, if I still had them at all (never been rich, always sold and found another, much like a car) because they would wear me out quite quickly. So, I tend to go for lighter ones now, not because of recoil, but because of weight. The .500 is not light, but I wouldn't plan to carry it much further than the truck, and the majority of its use will be simply to look at on cold nights. These are the things that please me. The same reason I still may get a second .577 one day. It's not for any practical reason at all. If I had always based everything on practicality, I would never have used anything but a 9.3x74R/9.3x62 or a 375H&H, or a .404.
But, for me, there was never any personal enjoyment in that. I was always wanting the next one over the horizon.
Do the things that make you happy. We're only here a short time.
As for one caliber being better than others, or larger is better, or smaller is better, it's largely bull$%#@, because whatever one's viewpoint is, life will find a way to turn the tables. Good men have been killed using all of them.