I’m taking live sound classes at my community college right now and we talked about this yesterday. The biggest issue with a large venue packed with people is the noise floor is very high. For instance if the crowd is 90db, then you’ve only got 10-20db of headroom to work with. 90db is already enough to cause hearing damage after 8 hours, and it gets exponentially worse with just a few db more, by 100 you can only safely be in that for 2 hours and that is generally the ideal loudness for that kind of venue. Of course since the engineers probably have hearing loss, they tend to raise it even higher to 110 which is loud enough to still cause damage over time even with regular earbuds unfortunately. So unless you can have a quiet crowd there is nothing you can do about needing ear protection, I recommend hanging by the engineer booth because they tend to be just far enough away to comfortably hear everything around 90db because they generally can’t use earbuds while actively mixing.
Same issue I mentioned in my comment! There’s a constant battle happening between the audio engineers and the noise floor of the the venue. It surprisingly doesn’t take too much more db to be heard above the crowd, like in a perfect world, if the crowd is sitting at 90db then 95db would be ideal. But unfortunately a crowd’s loudness ebs and flows and that can easily get drowned out so most just default to 100db and embrace the inevitable tinnitus. I recommend everyone invest in Earasers or something of that quality so y’all can appreciate music safely without losing all of the dynamics.