Every time you add a filter for a particular trait or attribute, you're removing filtering power on all the other things you're looking for. Want someone with above-average experience in $foo? You've just halved your candidate pool, which means in order to make a hire you have to relax one bit of selection in some other category.

The question isn't whether experience helps. It's whether experience helps more than the worst part of the applicant filter that you're using. If it does, you should use more experience-based filtering. If it doesn't, you shouldn't.