I think we spent a whole season of SNW with Pike going through various phases of "acceptance".If Kirk had touched the time crystals he would have not accepted his fate as easily as Pike
When we first meet him again at the beginning of SNW he is just about to quit Starfleet. (Again. Yes, it's a pretty basic Pike move apparently.) When he finally "accepts" it is when he finds out it will cripple Spock.
How many times did we see Kirk have to accept something that was still around in the next episode? I mean, he accepted losing Edith. But clearly we took longer to get over it than he did.
Kirk also wouldn't accept Gary Mitchel's fate. Ask Lee Kelso how that worked out.