I think you are quite right with regard to not caring about the financial impact. But, IMO, they should care about the marketing impact. When these 'taste makers' leave the mac, they will also stop recommending the platform and being aspirational to other users that follow the trends they set.
When apple was at death's door, these creatives were the core that saved apple, and they helped spread the halo effect. Creative's are hip and are aspirational for marketing. Who would you rather aspire to, an accountant counting beige boxes, or some dude making the next blockbuster movie?
Losing this core group is a mistake IMO, not for the financial reasons, but for their marketing pull in helping the brand be sheik. It's not sheik because of apple's cringe worthy ability to pull some band on stage after an announcement. It was sheik because creatives and techno elite thought having unix on the desktop in a clean way was cool. Once those two groups leave, what do you have left... even the accountants dont want to be the associated with that rind.
I understand your sentiments, but the point still stands. Your comments start off with reference to the past and what worked for them then. Nowadays chic is at the beck and call of the kids, not the creatives. I don't know any teenagers who have a phone other than iPhone. My kid's friends won't accept anything else.
That's their market, that's chic, that's brand loyalty going forward. When Apple finally falls it won't be because they didn't look after the creatives, it will be because the kids found a different way to express their 'chic'. No bearded, dark-room dwelling, middle aged, 20 core loving creative is going to prevent that.