I can appreciate your point, but you have to also consider that a characteristic of Apple is the sheer size of the business. Apple can afford to be more conservative with their business plans because they can weather storms more readily.

If Apple failed to plan for a huge economic event that let competitors gain some ground, they can survive that misstep because they have such a huge moat. Conversely, if Apple did over-hire, they can also survive that climate due to their size and stay the course while others falter.

If you're captaining an ocean liner (Apple) you don't worry too much about 5-10' seas and 10 knots of wind. If you're captaining a 50' yacht (eg. all the mid-sized SaaS businesses announcing layoffs) you definitely pay attention to that sea state.