Because Kyogre has this awfully long video of turning primal but I really want PINK Kyogre.
I would say that it is up to you.
If you really want a shiny kyogre that bad. you have every right to soft-reset until you get one. However, if I were you, I would just go for a modest nature instead of shiny.
It's all about how much dedication you want to put into it. Heck it will definitely take a long time but it depends on just how patient you are and how much you really want it.