After all, that's how all labels work (and perhaps even words in general?). They try to capture meaning, at best failing to do so (endlessly "approaching" it, always a step behind the evolution of language), and at worst ensaring peoples' thoughts and ideas.
It's a catch-22 - try to be more unique, in an effort not to lose your humanity, but in doing so keep feeding the machine which subsists on creativity. A human-AI ouroboros.
Hey, idk all the names people have made up to categorise fallacies, but I do know you misapplied the no true scotsman fallacy over a semantic disagreement, or at least a misunderstanding.
Honestly, claiming no true Scotsman fallacy over a semantic disagreement, is a fallacy in itself. I'm not talking about a "truer" or "purer" form of communism which marxist leninists failed to realise, because the definition I'm working with - of communism as a classless, stateless, moneyless society (and the ideas and ideologies branching from that definition) - encompasses far more than that specific ideology. This isn't even a defence of communism - if anything, I'm pointing out there are other facets of communism that would make for a more interesting discussion than rehashing how bad the soviets were for the millionth time.
While they share the common problem of dogmatism, I think that interpreting this as an issue of ideological "extremes" misses the point that moderatism is also an "extreme" - it dogmatically seeks stability of the status quo over conflict resolution, it "regulates" with an iron fist. Anything that becomes "ideological", that holds something sacred, valued above oneself, can be hijacked by other people pursuing their own interests (or other ideological interests), or lead to contradictions between values and needs and desires.
Just nitpicking, but if the usual price is 10€ and you want to offload the 30% tax to the consumers, pretty sure the maths should be 10/(0.7) ≈ 14.29€