This space mesh thing
The TLDR is still pretty long: The Earth is much bigger than you think so you need to liberally sprinkle some zeros on the end of your satellite count. You need thrusters to prevent solar winds from turning your space mesh into a space clump. Radiation glitches on satellites with thrusters is messy. Space agencies don't want your space junk. There are things in orbit that governments don't want you potentially looking at.