Disagree completely. Having a professional football facility to hold practice in inclement weather is critical to late season success. Especially, as you point out, league parity. So, if teams are similarly aligned talent wise, and football is a game off inches, having an effective practice(s) good be the difference in a win or a loss. A win in late season play could mean, your season is done or you move on to the playoffs or the next level of the playoffs.
Practicing in a hotel ballroom and being limited to a simple walk through is beneath a competitive NFL francishe.