Knoxville Catholic charges 10k+ a year to attend school there. Right now UT has been down and from a marketing perspective, I'm sure it doesn't hurt to have alumnus competing in the CFP and playing for one of the top ranked schools in the country.
No doubt, Catholic will have plenty more top players come through. As they continue to make annual appearances in the state playoffs they will attract talent from all over the state and possibly outside as well. On top of that, they probably do or could offer scholarships to other local HS players that are really talented.
As long as Tennessee is able to get back on track they will more than likely be the first options for many kids there. But right now there hasn't even been stability, let alone success. And that begs the question, why would any kid want to put themselves at a school where they may have to deal with what UT players dealt with this past year?