There’s no question that the rules in PRIDE favored strikers more than the unified rules the UFC uses.
The worst thing that can happen in the UFC if a fighter attempts a bad takedown is it gets stuffed and maybe, maybe, they get their back taken, every once in awhile a guillotine. But really, the reason wrestlers are so dominant under those rules, is the cost/benefit ratio when going for take-downs in the UFC favors the guy doing the takedown.
If everytime a fighter shot, there was a very real chance of them taking knee to the head, or getting a soccer-kick, if they got stuffed, we’d see much more cautious wrestlers and standup guys looser with strikers, especially kicks… like they were in PRIDE.
PRIDE had some guys who did okay with very little ground game under their belts. In contrast, the UFC and Strikeforce (unified rules) have had, and still have guys doing VERY well(I’m looking at you Jake Shields with his title shot, and total domination of the SF WW and MW divisions)who have NO striking ability to speak of.