As a geologist by academic training, its been my experience that two of the most misunderstood concepts by most people are the concepts of 'deep time' (time on a cosmological scale), and 'galactic scale'.
Imagine for instance the following symbology:
' ( * ).
where ' = Voyager I
* = the Sun
() = the heliopause
and . = Voyager II
(For those who dont know, Voyager I and Voyager II are the furthest man-made objects from the Earth/Sun)
Now think in your head (without looking it up on your phone or on Google) given the above diagram, how far away would Proxima Centauri (the nearest star to the sun) be?
Look at the diagram again. Stare at it again and think. Is it on the other side of your bedroom? The furthest outside wall to your house? Maybe a block or two away?
How far away would Proxima Centauri be?
You'd be wrong with any of the above guesses.
Now set your phone on your bed, and leave it there, get in your car and drive across town. You'd have to drive 8 miles from the little * on your phone and then place a ( . ) on the nearest sidewalk, and that period would represent Proxima Centauri, the nearest star to earth.
Much the same, our radio waves have had a little over 100 years traveling through the vacuum of space at the speed of light. So there is a bubble roughly 100 or so light years across and expanding, that represents the furthest our transmissions have traveled since the birth of radio transmissions on earth. But the Milky Way galaxy is conservatively estimated to be 100,000 light years across. So you can see the problem. If the sum of our radio trasmissions were the size of a single basketball, the Milky Way would be the entire Boston Garden (go Celtics!), or probably even larger.
So why would you have expected your signal to have reached anybody of consequence yet?
And time greatly complicates even those miniscule odds.
Deep Time: the universe is at least 13.8 billion years old.
The largest problem most Ufo-ologists have is they don't understand 'deep time'. They assume that everybody is alive at the same time in the Milky Way or the Universe, when clearly the opposite rings true. From earth's own geologic past we know that 99.9% of all the life to ever live on earth, has already gone extinct (and the way we are going, we are likely not too far from it ourselves).
So why wouldn't we apply those same odds to the rest of the Milky Way, and indeed the Universe?
If 99% of all life to have ever have lived in the Universe is already extinct, then the Universe is not so much a large zoo, as it is a large cemetary...
If this sort of speculation interests you, one of the best books I've ever read on the topic, was a book written, oh, 20 or so years ago, called 'Rare Earth', by Ward & Brownlee (I believe). They did one of the deepest dives I've ever seen into examining the Drake Equation and the possibilities for intelligent life, but with a more modern understanding of biology, cosmology, and geology. Great book...