I’d also add that a non-trivial number of people are female, gay, or trans and so it’s not just a move but accepting a non-trivial risk of severe to potentially fatal personal harm. If your family includes anyone of childbearing age, for example, continuing to work for Apple would require accepting the risk of dying for reasons which doctors in a free state could easily deal with, and no amount of money can fully remove that risk.
Texas state law gave certain Christian schisms veto power over your doctor. That means that anyone who might possibly become pregnant has to live with the risk that they will be denied medical care even in a life-threatening emergency, and even if they leave the state they have to worry about bounty hunters being empowered by the state to find them.
There are some possibilities for medical exceptions but nobody can count on them being granted by the religious authorities, and substantial harm can occur simply due to the delays that incurred.