Even if they do exist, it doesn't fucking matter. They may as well not exist because they're so great at hiding. What would their existence even do and why haven't they simply just held a press conference or killed us all at this point?
It matters to me if it's been hidden. In the US, there seems to be sustained effort to pour money into it without regulation. I say scrap it completely if the public continues to be in the dark about it.
On the contact side, it makes perfect sense to me they haven't reached out or destroyed us. Those are somewhat human ways of looking at it.
So if we continue that trend and look at how we've progressed, there seems to be more efforts to protect species in the wild, protect their simple way of life. Just 150 years ago we basically a had a license to mass murder anything we wanted.
As civilization progresses, even indigenous human species have way more protections to keep them isolated and shielded them from modern life. Essentially, it's overwhelming for them psychologically.
But as a technological species advances it seems only logical their rules for disturbing wildlife would also progress.
I wouldn't be shocked at all if we're in a similar situation. If something is traveling here from another system, we'd be very primitive to them.
We see glimpses, but just enough hints that we're being visited to let our minds wander, but also an easy out if we choose to ignore it all. "Meh its all bullshit." Works for most levels on the psychological fortitude spectrum.