None of them would run their companies into the ground to maintain their executive pay because they felt that would be 'unfair to their families', this is a CEO that is so self centered that nothing good can come of it.
But besides that, Mozilla - or rather, FireFox - is an important (though now much less important) technology component and a lawyer is not going to run a company making such a component effectively because this is not a regulated industry or a financial vehicle where having a legal background might give you an edge.
When three years from now Baker will have her nest egg completed the husk of Mozilla will quietly die and Firefox right along with it whereas right now there might (and that's a very small might) still be a chance to turn this around.
Regardless of whether you think lawyers make good CEOs, this lawyer is not a good CEO for this company, witness the performance of the flagship product, recent layoffs, the company financials and their recent statements.
I would say without a personal understanding of the challenges of the core business, their judgement would lack that influence. This lacking will absolutely effect the direction of the org. The numbers don’t lie as to the effect.