It’s interesting research, I suppose.
But look at our history. We didn’t start broadcasting until the start of the last century.
I’m sure we’ll continue to do so for the forseeable future, but how likely for another century? A lot of what was previously broadcast is now transmitted via the internet, which is mostly wired.
Who knows what other sorts of transmission possibilities may open up - eventually we may no longer generate as much.
But let’s say we continue to do so for another 200 years. That would be 300 years total.
So even if we happened to be looking in the right place, and found a civilization with similar advancement path, what are the chances we’re looking at the right time? And, given how long it takes those signals to reach us, the civilization we happened to catch broadcasting will have advanced thousands of years ahead - possibly dying out in the process.
Then there’s the possibility that intelligent life is out there in droves. How likely is it that they’re all friendly? I suspect most intelligent worlds would stop broadcasting out into the galaxy just to minimize the chance of their being discovered. Maybe being an EMF beacon isn’t the greatest idea in the grand scheme of the galaxy.
I agree with you on all your points. We are looking at a small window where our technology matches ET’s. I’ve also wondered if ET’s have made contact and decided that it’s best to go dark and not let anyone know where they are.
Earth is a noisy place, spewing RF in all directions.