"1. LEO latency sucks for FP shooters"
And I care? Because I really don't. I figure that's a problem for the people who play them.
"2. Given the shear volume of the sphere relative to the size/amount of the satellites, the "useful" space around Earth might be .00000001% more crowded than it was 10,000 years ago."
You have not defined any of the terms in that statement. You haven't decided what the size of the useful space is. You haven't decided whether you're including the full orbits or simply the volume of each satellite. And you don't seem to think of astronomy as a case requiring space, despite the fact that any ground-based astronomy does require a certain amount of open space above it so it can see.
"3. The biggest hazard to satellites and space stations of all types are still going to be the tiny particles of natural space junk - the earth moves through many paths of comets that litter the orbital environment each year, for example."
Yes, but you don't help by adding more junk. Especially as that debris exists at all levels while all these satellites will be in relatively close proximity.
"4. Any Ham worth their salt still learns morse code, and has a 100 ft tall antenna in their back yard that screws with their neighbor's tv reception."
What? I don't even know what your point is. If your point is that radio astronomy doesn't work well near those people, that's been common knowledge for decades. You can go away from those people and have a better reception. You can't go far away from satellites because they keep moving. I'm guessing you meant something else, but I haven't a clue what it is.