I like watching football. I've been to many BYU vs FCS games.
If conditions are perfect, they can be an OK experience.
They are usually not entertaining. I have no great memories of FCS games.
When schools play games that are unentertaining and then whine that fans don't pay money and spend time to watch, I feel like the school is being less loyal to the cause than the fans. If there are benefits to FCS games, sure, keep playing them. But don't whine if fans have better things to do with 4-5hrs and maybe $100.