While in principal I agree with you completely, quitting is often the least beneficial route to leaving a job. Allowing employers to get away with basically saying blatantly illegal shit to their employees to scare them into accepting terrible conditions is extremely detrimental. “dont quit” should always be accompanied by, “make them fire you.”

McDonalds didn’t post this sign to make sure more employees take advantage of the benefits of being fired over quitting. They posted it to scare uninformed workers into accepting abusive conditions and remuneration.