Because?
There are technological advancements we can learn about that might change everything we know about many many things.
So why would be stick our heads in the sand and ignore it?
You think our actual enemies are ignoring it?
Should we wait until THEY possess variants of those advancements and THEN start working on figuring them out?
Hey if it threatens your ego or sense of humanity or what then just ignore it and let the rest of us do that.
Are there green men in your backyard lol. Did they probe you?