I disagree. Perhaps these roguelike examples will clarify.

You can Raise Concerns towards the project. The project is mired in your concerns! The project loses 5 HP extricating itself from the muck! The project moves forward. --more--

This indicates that the project considered the concern raised and chose not to halt work over it; those 5 HP who might be impacted should continue planning for that impact. Most likely, in Git's case, that's either 'the good of the project outweighed the impact to the few' and/or 'no one is willing to commit developer/maintainer hours to us for that platform so we're bailing on it'. I haven't uncovered any evidence that they tend to lie about project motivations, and certainly I would not classify the project founder as 'uncomfortable sharing unpalatable views', so I have no evidence supporting the accusation that the Git project might refuse to consider a supported claim that has not already been evaluated.

You cast Unsupported Claims towards the project. The project's shield reflects them! You take 5 HP of Reasoning damage! The project moves forward. --more--

A politely-phrased objection is meaningless if it isn't backed by reasoning that can be considered and either accepted or rejected by a project. People do try, but disappointingly, human beings are sometimes vulnerable to politeness attacks of this sort. I can assert with near-perfect certainty that Git is not vulnerable to polite but unsupported objections.

You cast Hostile Tirade towards the project. The project casts Protection from Hostility! Your tirade has no effect. You blink away! --more--

Everyone is looking to ignore this kind of criticism. The roguelike joke makes it especially clear that the criticism was not considered solely due to how it was presented, rather than by whatever merits it may have. Doesn't matter how substantive the claims, being mean typically guarantees both disregard and eviction from the chosen battlefield.

ps. Note that in some cases, the project will abandon the requested outcome. Human beings have a certain percentage chance of sacrificing personal gain to 'reward' hostility with an outcome that is maximally undesirable to those being hostile. This can result in ending support for platforms that might otherwise have remained support, or even outright shutdown of an entire project. See also: Fez 2, libxslt, et al.

pps. None of these outcomes guarantee that they will change course, even if a perfectly-supported and politely-presented argument is made and considered. None of these outcomes guarantee that one will receive a considered rejection rather than a blind rejection, either. There is no Konami code, but one thing is certain: one cannot win an boss fight by throwing the controller at the TV.