Not just Lou.
Hawking was also of the opinion that if the dark forest theory is accurate making contact with another advanced civilization has a significant likelihood of ending catastrophically for us.
It's possible govt's have already communicated with them and just don't tell us. So far, it seems as though they don't really have much interest in us. Elizondo thinks that they are coming from either another dimension, outer space or here. Lots of scientists like Neil Tyson think that space travel would be impossible, but what if they are coming from here? Then, I wonder how or why would they hide from us and for how long? Also, if they are native to earth, they'd have to be small, population wise, or we'd see them a lot more.
I tend to think that they are of course so far advanced that we wouldn't be able to do much but what if they leave us no choice? It's the cowboys vs. the indians again. Also, what if we're just a nuisance to them? We are bad for the earth, we are not good for much else other than ourselves really, I could see them just wanting to unburden themselves.
Also, there are theories, wacky ones, that human civilization was founded with the help from aliens, that we were slaves to aliens thousands of years ago. That we may have been tinkered with by aliens and some of our religions may have been influenced by them.
So far, they are just being mysterious and although I'm always the first to be skeptical of the voluminous footage we have of them, we should always think it's fake before we think it's real, some of it seems to be awful realistic looking to me. Not only that, like I keep saying, when i was a kid, it was always the hillbillies who saw ufo's, now it's people with at least half a brain like pilots who are saying it. I think there is really something to it.