I'll share this experience with you, I'm not much of a ground guy.
If you're a brutal, aggressive striker you have a certain mental effect on grapplers.
I am never intimidated by, oh he might kimura me. But if you have a lethal striker it can be unnerving.
This is why most of the title holders are fearsome strikers, excluding a few.
A world class bjj champion isn't as intimidating as an amateur muay thai fighter, for real.