As cool as that would be, why would they? I mean what do they have to gain from it? Maybe a few more Linux users will buy MacBook's but not enough to impact their bottom line. Plus those users wouldn't be part of the Apple ecosystem and at least since the iPod Apple's goal has been bringing you into the ecosystem.
Speaking of fancy new chips for servers, I'm not seeing anyone complain about Amazon not opening up their graviton processors... (can't even buy one for F's sake, have to lease them via AWS)
shrug doesn't look like they need it. As long as they keep churning out machines and devices that make people's wallets reflexively open, they don't have to pander to the tiny minorities...
Not a particularly nice situation to be in, if you're not in the Apple ecosystem, but there's the world we live in, and the world we wish it to be. Only sometimes do those worlds overlap.
I bet the number of people within the technical user base for whom the lack of linux support is a deal-breaker is significantly smaller than the number of people who don't care.
So while it's a nice boost in goodwill, it's probably small enough for Apple to safely ignore.