What makes you think this post is about the third party client API? The commercial API tiers have also been nerfed [1] to a level where you need Enterprise to do almost anything useful.
I think the enterprise plan is probably intended for established corporations that already pay out hundreds of thousands per month. As developers we're looking at it from the perspective of like "I want to build X on top of the twitter platform" but from their perspective it's more like "I want to sell access to my database to Pepsi and ESPN."
[1] https://twitter.com/TwitterDev/status/1641222782594990080