>>715369738 (OP)the great filter is very obviously just FTL
the fastest and farthest-reaching signals we can send are radio and this is how far they can reach into only our galaxy out of over 100,000,000,000 galaxies
we're asking
>why haven't we heard from anybodywhen we're doing the equivalent of whispering somewhere on earth and expecting anybody on the planet to answer
and until we figure out how to make stable wormholes or something like a functional alcubierre drive, objects with mass will never ever travel at FTL speeds
even light-speed isn't fast enough, it takes over 100,000 years for light to travel just from one side of the milky way to the other
there are definitely aliens out there, but it is unlikely that we will ever encounter them without some insane FTL technology that nobody has even conceptualized yet
space is simply too big