Gabe didn't waste time.
He says this Baratto thing is too hot to waste time.
Why waste time beating around the bush?
He will not waste time upon triflers who deny what he thinks, in the light of the (empiricist!) Design argument, an absolutely clear truth.'
In this passage he deprecates current physiognomical speculations, saying that he might criticize them but feared to waste time and become tedious over them.