The amount of self loathing in display here is astounding. Or I guess, "temporarily embarrassed millionaire" syndrome?
A hiring decision is a huge change in an employee's life. People uproot their lives, may have to move away from friends and family. They might need visas.
For a big company CEO, getting fired changes basically nothing material. They still have millions of dollars, they most definitely aren't on a work visa.
A rich, profitable company for sure can afford and should try to salvage every suboptimal hiring decision, at least once.
Except for the CEO, that basically gets all the money and no real risk. A CEO will never starve, will never get kicked out of the country, etc.