Most of the US is a right to work environment where a company can let someone go at any time for any reason other than the few protected class reasons. Many companies also have 90 day probationary period where they bypass internal company processes and let someone go, again other than for protected class reasons.

It's obviously hard when people's lives are upended, but no one complains when companies do a lot of hiring because the risk is lower.

It starts with some things that minimize the lawsuit area, but over time it transforms into a habit of lying. It's company policy, you know? Don't question, just execute.