IMO, for technical, scientific reasons, we do not possess biologic remains or parts of spaceships from outside our solar system. Cosmic radiation, particles smaller than an atom traveling close to the speed of light throughout the universe, destroys even shielded components and DNA. Astronauts' face shields get permanently fogged from said radiation in short space jaunts. Their DNA also gets damaged. On earth we have some protection due to the magnetic field and atmosphere but even we get changes to our DNA from cosmic radiation. Some of this damage causes a mutation that provides an advantage and is retained in future generations, aka evolution. Another reason is it's simply too far. You are more likely to flap your arms and fly to the moon than other intelligent life crossing millions of light years to our planet. Any biologic entities and their craft would be destroyed during the long, long, long trip. David Grusch is a gullible victim of too many "get a bucket of prop wash" pranks. Most photos of him in uniform are as a lieutenant, not a "high ranking official" as many journalists call him. Why did he really separate from the service? Was he close to getting passed over / RIF'd? IDK. He admits that he has never seen what he claims to exist ... all hearsay. What you are seeing is dirt on the sensor, software glitches, etc, not aliens. If you are drinking the Koolaid it's more probable we are catching glimpses of demons and angels from a parallel spiritual universe than aliens. Is there other life out there? You bet. Universe is too large not to. Is it advanced like we are? Much tougher question. We are a goldilocks planet in a goldilocks solar system in a goldilocks galaxy living in a goldilocks timeframe. Life that advances as far as we have is probably sparse and short lived, killing each other off or a natural disaster (big asteroid, snowball earth) kills off all the food supply. Wheat grown on our farm in KS, think I'll store a few bushels just in case!
Thanks to
conrad gutierrez
for selling me this beautiful AAPK blue bone at cost. Stay sharp!