It isn't feasible to design an AI fighter jet with a limit of 30G. The airframe necessary to handle that strain would be way too heavy, seriously limiting the fuel load. And how would you avoid compressor stall in a 30G turn?

Dogfights no longer occur anyway. What matters is early detection.

To add another response, (a) dogfighting is not something 5th+ gen fighters need to be good at and (b) no fighter is ever going to tolerate 30G in anything except maybe a straight line. Fighters are big and have big shear stresses and would tear apart long before then.

I said AI-piloted in the first sentence.