The issue is what critical thinkers would recognize as an equivocation fallacy: It's one thing to classify certain software as 'free' according to a particular definition. It's another thing to attribute a moral judgment to something by using a certain term such as 'free'.
Objection number 1 is about Stallman's use of the word 'free' in the second sense. Your response is about the use of the word 'free' is the first sense. Therefore, you either misunderstood the critics, or you're deliberately erecting a straw man.
My guess is on the first interpretation: "Please, feel free to use any proprietary software you want." is the opposite of what the Free Software movement is all about: One should not use proprietary software! It's evil, according to Stallman.