Totally agree.
Not sure if you're involved in the development / spec process for WebDriver Bidi, but the big limitation atm is that it has almost no support for the devtool inspection use cases served by the Chrome Devtools Protocol (CDP) and the Firefox Devtools Protocol (FDP).
The Servo and Ladybird browsers both have FDP implementations (and Blitz has an in-progress CDP implementation) for this reason. But we'd all love to switch to a single standardised protocol if it had the requisite support.
(if kitesurf does upstream their patches then presumably we'll get a CDP-based automation API as part of that)