The programs with track/ football athletes that find a way to make it to "Spring Football" tend to have those kind of programs that end up in Lucas Oil year after year. I doubt the two-sport guys at HCC or MIC schools are sitting out football installs when they CAN make it. Obviously not a mandatory thing but good to get a jump on the little things for sure. If your program is worth a darn you're lifting 3+ days a week anyways all year long so you might as well do a little Indy and Install on 3 of those days to get a head start on the basics with as many athletes as you can during this allotted spring limited contact period.
I will add. As far as your Track > "Spring Football," I do agree with that way of thinking. I just love when the two-sport guys prioritize both, and more often than not those guys' programs tend to win way more, hence my statement above.