I always find these statements annoying. However, I will correct the annoying part for you. :-)
“...ocean is too sulfurous for life, AS WE KNOW IT, to exist.”
The height of hubris is these scientists believing they know it all about LIFE! NOT!
I said there’s evidence, not fact. It may not be arrogant to hope for life in the universe, but to overestimate the odds does seem desperate, as if our own requires more meaning by confirming it elsewhere.