Even the title says it's webkit based

Isn’t this why ladybird exists?

That page only lists browser engines it thinks are "notable", which is not the same as viable. Microsoft stopped developing its own engines when it moved Edge to Blink.

Currently there are four viable browser engines (still being developed and capable of displaying enough sites with enough accuracy to make a plausible daily driver) in two families: WebKit and its fork Blink, and Gecko and its fork Goanna. Goanna is not corporate. In addition, there are some experimental engines, like Ladybird's.

I won't deny that the situation is dire, but it isn't quite as bad as you've painted it. Yet.

If it's WebKit-based, it is still using one of those four engines owned by large companies...the engine isn't the selling point. As I read it, Orion is to Safari as Brave is to Chrome.