Matt isn't being held to a higher standard, he's being held to a different standard, a standard he chose.
WP Engine is a company that chose to build a business around a piece of software released under a license that permits their commercialisation of the software.
Matt is an individual who chose to release software under a license that permits companies to build a business around the software and has then chosen to initiate a "nuclear war" against one of those companies who is complying with the license he chose to release the software under because they are not contributing to the software in a way that he deems acceptable.
They're fundamentally different actors in fundamentally different positions. WP Engine has behaved exactly as one would expect from the start. Matt has behaved in a way that suggests he has lost his damn mind, doing everything in his power to harm a business that is complying with the license he chose.
I don't disagree with the idea that WP Engine should contribute more, I don't disagree that Private Equity is harmful to Open Source, but I fundamentally disagree with Matt's weaponisation of Open Source to make a point. There is a lot of great prior thinking on this subject[1], Matt has many options, he is making the choice to behave in this way, it is not a foregone conclusion.
Our discussion isn't going to lead anywhere, but we can revisit it in a month when Matt's downward spiral has resulted in the inevitable. Perhaps, at that point, you'll reflect on whether Matt's behaviour was worth supporting.
It's foolish to support a private equity against the guy because you hold him to a higher standards. It doesn't even make sense.
But this discussion is unlikely to lead anywhere.