We know that he is an elite point guard and an all-star player but having this kind of attitude? This will destroy his career TBH. His ego is at its highest that he is requesting things like this. Its good to see that the Nets didn't accept his request.
source https://www.forbes.com/sites/tommybeer/2021/10/14/kyrie-irving-confirms-hes-unvaccinated-and-explains-why-he-has-refused-the-shot/?sh=22a76ac7f9c8
He does not give the full details but that is more than enough for us to know that it's his own discretion and he doesn't want to be force to get vaccinated, and it seems like he really stand for his word as he is willing to sacrific millions of dollars coming from his pay this season.
If he doesn't want to then so be it. The Nets are the top though without him and if it continues to be like this, there is a high chance that they will trade this egoistic player.