The cloak of words has always been needed, for some reason, to convince a population to make the sacrifices necessary to go to war.
Yes, there have been other spoken reasons for invading a peaceful sovereign country. This does not change the fact that Russia is the belligerent party against Ukraine, or that China is the belligerent against a completely harmless and peaceful Taiwan.
Taiwan's situation right now is very similar to Czechoslovakia's in 1938. There is no international treaty with teeth to protect it. There is every reason for China to create a rationale for invading it. The people there have a decent life and don't want to live under occupation. And the reasons for invasion look similar; taking over industrial capacity under the guise of saving people from their confused political state.
It is indeed somewhat similar (though the sea is a better barrier + they don't have a major fifth column on their territory). And I would smell rat if it was a Chinese CCP official uttering the words about "political instability", but that would exactly be the change of context necessary.
If a HW/SW engineer speaks about "political instability", they simply acknowledge that there is no way to tell what will happen in context of their own jobs.
> The cloak of words has always been needed, for some reason
Needed? Probably not. There is just no reason not to use that cloak of words.