> The solar systems at the center of the Galaxy are uninhabitable

I always such statement a stretch when spoken with such clear confidence. Simple answer is that we don't know. We assume its hostile based on our own understanding of life on our own planet. There simply could be life that uses that high levels of radiation as energy source and be able to withstand radiation. Imagine a Silicon based lifeform? or something completely different than our own DNA based versions.

Specially when we continue to find life on our own planet in extreme inhospitable conditions where life simply shouldn't be possible.