Actually I'm going to disagree strongly with that statement.

Small business are far, far worse at abusing workers. If a small business fires you, you've got absolutely no recourse. They can lay you off with no severance and then hire someone new a day layer, and who's going to do anything about it? They don't have that many employees so there's no pattern and no class-action, and you can't afford to hire a lawyer to spend years fighting them in court.

In comparison, when you work at a big company, they have rules and an HR department to make sure they're going everything legally. Your boss wants to fire you? First your boss has to give you a negative performance review detailing exactly what you're doing wrong. Then they have to give you an opportunity to correct it. Only then can they fire you. At an absolute minimum, it gives you a chance to start looking for a new job. Often it gives you a chance to transfer within the company, if you were otherwise a well-liked and valuable employee.

If a large company wants to let you go, they're going to give you severance pay and extended benefits.

Of course you hear about the occasional incident where Elon Musk fires someone on the spot or a Disney employee gets reprimanded for something silly. But those incidents are extremely rare, and most of the time they end up settling behind the scenes for a nice severance.

Now, I know, I know. The HR department is there to protect the company, not you. But that's exactly why the HR department ensures employees are treated well, even when they're fired - because they don't want a lawsuit later.