Easily. You only get upset if you’re attached to your resources. This is a game, you shouldn’t be attached to anything within the game as that then prevents you from using it (or deleting to replace with better)
LOL, this isn't a psychoanalysis forum. Stating one would get upset for paying more for something than they could is NOT a bad thing no matter how much you think it may be. And it has nothing to do with being "attached" or whatever psycho-babble nonsense you want to interject here.
If you are OK with paying more to level your GBs, have at it. However, I personally try to maximize my FP bank and get the most out of them, which includes paying the least amount to level my GBs. If I do, in a very rare case, get sniped, I don't just "awe shucks" it. That does not suggest that I am attached, just that I don't want to have to pay more than I have to, since it costs more and takes longer.
Regardless, my comment was in response to someone making the argument that people get mad at being sniped because of the rewards not being owned. I was arguing that they get mad not because of the rewards, but because it costs more to level their GBs. My question was in that context.
BTW: What could you possibly get that is better by "deleting" FPs?