I agree, I see it both ways. The problem is the UFL wants to have full stadiums, but then is using 64,000 seat arenas that they will never come close to filling.
St. Louis has really good attendance, averaging around 30,000. Everyone else hovers around 10,000 though. Michigan was around 8,000 in Ford Field. It feels like they would be better off leaning into that attendance expectation and booking Van Andel Arena (capacity 11,000) or even the new Amway Stadium that just recently broke ground (anticipated capacity 8,500). If you're routinely selling out, your crowd is going to be better and your product will improve. It will be a hot ticket in town and people will tune in on TV to see what the fuss is all about. The UFL doesn't seem interested though, the smallest stadium they use right now is DC's Audi Field (capacity 20,000)... Notably though they're not relocating the DC team.
Maybe I'm wrong, I'm just a fan.