Clear explanation, thanks. Seems that many companies have moved from California to Texas or Tennessee. Am I wrong?

You're not wrong. The reasons why come down to really one or more of these factors:

1. To lower labor costs. For example, the Big 3 auto makers are unionized. Tesla's manufacturing isn't. Guess who earns more? [1];

2. Deregulation. Some things (eg polluting) are way easier to get away with in Texas than, say, California;

3. To shift the tax burden from the owners to the workers. Texas famously has no state income tax. It does have sky high property taxes though. Property taxes are a super regressive tax;

4. For the politics of the owners; and

5. Other miscellaneous reasons. For example, Texas is about the absolute worst place to get divorced for a spouse who is a parent and isn't the primary income earner. Why? Texas courts won't let you move out of state with the children [2] and child support will be severely capped [3], even if, say, the other parent is a billionaire.

[1]: https://www.businessinsider.com/tesla-pay-vs-ford-gm-uaw-uni...

[2]: https://www.thetxattorneys.com/child-custody/relocation

[3]: https://ondafamilylaw.com/what-is-the-maximum-child-support-...