And yet they're so massive that them all doing layoffs at the same time despite that profitability has a huge impact on the labor market of the while industry.
If someone produces less effort than they cost, it's reasonable to fire them even if the organization as a whole is profitable. That's probably not what the FAANG companies did, but layoffs are not unjustifiable for profitable companies.
Your employer doesn’t need you to buy food or pay for a roof over their head.
You need your employer to stay fed and housed.
There is a lot more downside for you than your employer, thus a massive power asymmetry. The only way to restore the balance is solidarity between workers and it’s usually a union (or a guild)
I don't need my employer for that either, because they're competing for my labor in a market with many other employers. It would be extremely costly to replace me because of the critical role I have on a highly profitable product. If anything, I'm the one with leverage, which I use every year to request more pay, fancier titles, and larger responsibilities.
Realistically, if I were laid off today I'd likely land a better paying job than this one. I choose to stay because I like my boss, my work, and my coworkers.
If circumstances changed such that it made sense to lay me off then I should be laid off. Why should anyone be obligated to pay my salary if I'm not offering commensurate value?
Get some financial discipline and arrange an emergency fund covering at least 6 months of expenses. It's amazing how much less leverage your employer is able to exert if you can make good on a threat of leaving.
Should poor performers be immune from layoffs? When is a layoff justifiable?
I'm free to leave my job at any time, so why shouldn't my employer be free to leave me?