Doesn't appear to matter in the Florida series. We've had better teams many times in the last 25 years and still lost. I'm sure Vegas will have Florida favored as they should.
First, find a time when we've had "better" teams. They typically, at least over your arbitrarily chosen time period, out recruit us. This is due to their proximity to elite talent alone.
I think you can look at historical rivals recruiting back to 2002 for proof.
Next, define "better." If your thesis is correct, how does one team consistently lose over a 25 year span with "better" Teams?
They don't.
Since 2002 I can't find a four year period where UT out recruits Florida. That means that considering the win rate of 70% that talent predictions generate, Tennessee could expect about 3 wins a decade, give or take. Like a coin flip, randomness has an effect and a perfect 70/30 distribution is unlikely.
If you want to put this in perspective, look no further that UT and Vanderbilt. The history is one that illustrates long term talent advantages. It isn't magic, or psychology, it is the reality that better players make a considerable difference.
When we win on Saturday (if we win) it will be a combination of how home field advantage and coaching can overcome bad coaching with considerable talent. Make no mistake, this Florida roster could be great but their performance is an exception and a reflection of the rare times when coaching matters more than talent.