We don't know what we don't know from physics, the arrogance of thinking we get it all was there numerous times and it was always a wrong emotion, we even realize it for our current theories. There may be quantum entanglement communication, higher dimensions, strings or basically anything your nor my mind can't even come up with right now. Just like cavemen simply couldn't come up with general relativity even if it was all happening right in front of their eyes.
"We can detect things we were not evolved to detect" is a non-sequitur, a true statement that does not refute the original argument. Because we can detect some things we were not evolved to perceive, does not mean we can therefore perceive aliens.
I mean no condescension when I say that I know that is a difficult concept to grasp. Everything we are is perception, pattern recognition, threat assessment, problem solving. That there might be something important in our environment that we are simply not built to respond to is far easier to reject outright than to consider. In fact, it is literally meaningless speculation. This is why it's my favorite, because it is so challenging to consider.
We can detect neutrinos with advanced instruments. We've never had an evolutionary reason to do that.
There's really just no room for this explanation. Energy and mass are one and the same. If we can detect neutrinos, but not these intelligent aliens that are everywhere, it means that they don't occupy physical space, don't have mass (and therefore must move at C only), don't use energy, don't send signals to one another, don't accelerate or decelerate, aren't involved in chemical reactions, don't interact with any of the particles we do, don't perceive light, etc. etc. At that point, they basically don't exist in our universe.
It's not enough to say "but ants don't know we exist!" -- first of all, yes they do. Secondly, you're really saying that intelligent ants who formed an advanced society, had a scientific revolution, and built instruments capable of determining the number of moons on Jupiter, still would not know we exist. That is clearly ludicrous.
And this doesn't even solve the Fermi paradox! There's clearly plenty of "room" for aliens that are "somewhat similar" to us; that is, they actually are made of protons and neutrons, etc. Where are all those aliens?