It is a very contentious discussion, and it seems like a lot of half-educated people are sharinng opinions. The way I understand it, today's population of Taiwan largely want to be an independent state, and all those uncreative jokes about ROC being the real China actually torpedo that.
I'm generally very careful with downvotes on this platform, as I think they should only be used when something is plain wrong or detrimental to the discussion. For me, your comment falls into the second category though; it doesn't add anything to the discussion, but seeks to rile up people to start downvoting or brigading others.
I think the idea of independence is still fairly contentious within Taiwanese politics, though they're currently governed by a pro-independence party so maybe that doesn't really matter. It is true, though, that the current cross-Strait consensus would be upset by Taiwan NOT claiming to govern the Mainland, making the "West Taiwan" jokes not make any kind of sense.
I'm generally very careful with downvotes on this platform, as I think they should only be used when something is plain wrong or detrimental to the discussion. For me, your comment falls into the second category though; it doesn't add anything to the discussion, but seeks to rile up people to start downvoting or brigading others.