I never understood why Fermi should be a paradox.
Space is mind-bogglingly big. Insanely huge. And almost everything is empty. Primitive life (bacteria, fungus,…) might evolve on every other planet, but even mammal like life is probably not that common. Maybe 1 in 10k solar systems has them?
And now my sad hypothesis: FTL drives are simply not possible.
Also, did I mention space is huge? Sending radio signals to a planet 10k ly away is very non trivial. Unless they point a huge dish exactly at us and we point a huce dish exactly to them, we won’t hear each other.
The idea that extraterrestials will watch our TV in 100k years is absurd. (Sorry Lrrrr)
They probably can. jut every hack done has the possibility of spoiling the exploit. A good exploit can cost a million $. So if hacking you is worth more then say 100k to them, you’re in trouble. Otherwise they will only target you with everyday surveilance.