I look at Fclass like formula 1 and PRS like Baja trophy trucks. They run at the pinnacle of what is capable performance wise. Benchrest is like top fuel where in the delivery system is highly specialized and not remotely practical in a hunting situation. "Good enough" accuracy and "doesn't really matter" are bul****t terms that all of us as outdoorsmen need to get away from! Is 1moa acceptable for deer hunting out of a blind.... absolutely! But .7moa is better.
I'm not the best trigger puller alive so if taking a blank to a smith could possibly be the difference between 1moa and .75moa I'm going to hedge my bets with the most potentially accurate inanimate object possible.
There isn't much if any cost difference between a blank/smith combo vs prefit. Also if you have a prefit that isn't shooting right then you are sending emails and sending packages to get the issue resolved.
I'm not knocking prefits and if you are ok with "good enough" then full send! I will likely buy a PPB prefit for a howa mini I have one of these days.