In the public mind (even if not in reality) when someone "resigns" because of "past comments", they have either been given an ultimatum - "Jump or be pushed" - or they are experiencing intrusions into their personal life (or there is behaviour from the community that makes this person believe these intrusions are imminent)
My understanding at the time was that it was the former - there were murmurings of possible action against him, and whether it was to avoid harm to the FSF or risk the public damage to his reputation I have no idea, but he decided to gracefully step aside.
So yes, officially you may be correct - but especially with someone like RMS, it is highly unlikely that he just chose to resign because he previously made comments that people didn't like. RMS is very used to making controversial statements and weathering the storm, I find it unlikely (though not impossible) that this was just one storm he couldn't weather - and much more likely that he chose the path of least damage, to himself or his cause or his legacy.