People often say that they have a right to an opinion. This is correct. But you have no absolute right to express it, especially when there are considerations attached:
a) Is the opinion informed? Where is your evidence and from what source? Is your source credible? (e.g. it can’t simply be ‘everyone says so’ or ‘the Pope (substitute any religious personage or book) says so’, or ‘My friends say so’, or ‘I formed this group and now I’m an expert’…)
b) Why are you expressing an opinion? To cause hurt or harm? To correct an error? (see (a) above) To unload? To troll a conversation? Because you dislike the person speaking?
c) Does expressing an opinion add anything to the cause or issue that is being discussed?
d) Is your opinion rational? Or is it emotional? It isn’t a bad thing to express one’s emotions, but then be honest about it — don’t dress it up as if it were thought-through argument.
e) Are you clear about your terminology? For example, do the words ‘gender’ and ‘sex’ mean the same thing? Does everyone use the term your way? If not, you’ll end up talking at cross-purposes.
f) There is a difference between ‘an argument’ (noun, meaning a rational process of thought that forms a defensible position) and ‘arguing’ (verb, meaning to have a go at someone because you want to vent your anger)
g) Did you really read the question? I mean, did you understand what was said or just jump to a conclusion?
i) The meaning is in the person NOT in the words. Words can mean whatever the utterer wants (otherwise, such activities as poetry would be impossible).