Tp4 is VERY worried about that.. if you get enough accesspoints together, you essentially have a 50-100 watt microwave.
Read all of this because it gets worse before it gets better.
You're probably never going to be in line of sight of more than 3 towers and much like 5.8 wifi (which it basically is), almost everything blocks it. So while yes, it starts off very high wattage, it drops extremely fast. Plus, the closer you are to one tower, they further you are from others.
Frankly, you're more likely to get a 50 watt blast from a single tower than you are from 6, especially with 5g.
5g is going to nearly triple the wattage from each tower but the range of that tower (in the 5g spectrum) is a lot less less and that's before you add in obstructions and beam shaping. If you barely get a good 4 signal now, 5g will be worse.
But about that 50 watts...
You need to look at SAR (specific absorption rate) which is measured in watts per kiliogram, 4watts per Kilo (2.2pounds) is considered safe for a frequency in this range. A 150 pound person can handle a constant 272 watts safely. But again, almost everything blocks 5.8ghz and that's a constant measurement.
Beam forming is important here...
Is just a shaped directional antennae. An omni directional creates a donut shape around itself, directional creates a cone projecting out from it. Beam forming acts like a stage spotlight or focused flashlight, you can aim it to cover a specific part of town with a specific shape, so like exactly 2 city blocks and nothing else around it. That's all it is. Like a spotlight it also needs to be mounted up and far enough away for the signal to fan out, which is why it needs such high power, it may have to project that beam a mile before it even starts to hit ground level. It also means, once you step out of that beam of coverage, your exposure drops to almost nothing, you can stand right next to it and get almost nothing.
Now remember where 5g is being installed.. towns and cities.. Places with tons to get in the way.
So unless you're standing out in the open, not moving around, with direct line of sight to the tower, in the beam, for hours at a time, day after day... I'm pretty sure you'll be fine.
Oh and that whole aircraft thing..
The F.A.A. has never upped the standards or made old planes conform to tighter narrow band radio frequencies. EVER. We have narrowed nearly all bands in order to fit more bands in, we completely ditched radio based TV, narrowed all radio station frequencies, compressed cell bands, while all of this time aircraft were left untouched. A new radio is a drop in the bucket for aircraft maintenance, especially if it's a one time thing and yet they just left them alone so some guy could keep using his vintage ultra wide band pre WW2 era radio at all airports... Ridiculous.
BTW, air traffic control can push 100k watts, care to guess the frequency range?
Stop being NIMBYs.