Uh, I don’t think you understood their point. Tankies aren’t communists, they’re authoritarians with a red paint job. We’re not talking about nuanced Marxist thinkers, we’re taking about people who think “Just line everyone who doesn’t accept my exact interpretation of communism up against the wall” is rational praxis.
These people don't exist, so effectively the purpose for maintaining this as your definition is to use it as a discussion-terminating club against those that uphold socialism as it exists in real life, tacking on the sins of this strawman like a scarlet letter A.