I think what you were missing is that the crux of the problem is that this obscured the fact that a small minority of astronomers at a conference without any scientific consensus, asserted something and you and others uncritically accepted that they had the authority to do so, simply based on media reports of what had occurred. This is a great example of an elite influence campaign, although I doubt it was deliberately coordinated outside of a small community in the IAU. But it’s mainly that which actually upsets people: people they’ve never heard of without authority declaring something arbitrarily true and the sense they are being forced to accept it. It’s not Pluto itself. It’s that a small clique in the IAU ran a successful influence campaign without any social or even scientific consensus and they’re pressured to accept the results.

You can say well it’s just the IAU definition, but again the media in textbook writers were persuaded as you were and deemed this the “correct” definition without any consensus over the meaning of the word being formed prior.

The definition of a planet is not a new problem. It was an obvious issue the minute we discovered that there were rocks, invisible to the naked eye floating in space. It is a common categorization problem with any natural phenomena. You cannot squeeze nature into neat boxes.

Also, you failed to address the fact that the definition is applied entirely arbitrarily. The definition was made with the purpose of excluding Pluto, because people felt that they would have to add more planets and they didn’t want to do that. Therefore, they claimed that Pluto did not meet the criteria, but ignore the fact that other planets also do not meet the criteria. This is just nakedly silly.