The headline is inaccurate; what's being referred to is this part of a statement from NaNoWriMo on the use of AI:
We also want to be clear in our belief that the categorical condemnation of Artificial Intelligence has classist and ableist undertones, and that questions around the use of AI tie to questions around privilege (source)
That's plenty bad enough, no need to embellish it.
Not disagreeing with your general point, but music production in Linux is not "stuck on LMMS". Reaper runs natively, and there is plenty more.