I don't think the comment you are replying to is giving up leverage. It's simply pointing to the OP that what he seems to be upset is not the thing itself, which everyone does, but only that he knows about it or ignores others doing the same.
"I complain about some people doing X openly while I ignore others also doing the same X behind the scenes"
is absolutely not equivalent to:
"Complaining that X sucks does not imply I am ignoring that some other unrelated Y also sucks".
Nobody said that they're ignoring anything, hence putting words into the mouth of others part, and claiming that criticism of A implies ignoring B.