If they decide that, then you don't have an inherent right to work there. You're allowed to quit.

It's similar to how people who are unwilling to dispense reproductive care or contraceptives have many career options available to them - but no inherent right to be pharmacists or doctors.

This seems patently ridiculous. How can there be no limits just because a perspective employee can theoretically refuse?

What if all the companies decided to have these requirements?

There's an inherent power imbalance here that isn't so simple as dismissing any issues simply because there is no literal gun being held to the head at the moment of decision.

And I'll assume even you have limits somewhere. For example, predicating employment for a cushy remote via snail-mail job on a specific person happening to die... Eventually you just get to the most threadbare excuses for soliciting illegal activity.

You don't have a right to work anywhere specific, but you do have a right as an employee that a big list of things cannot be required by your employer.

You're just arguing against the idea of employment laws as a concept. Where do you draw the line? I would have assumed "Employers don't have a right to require physical mutilation" would have been a universal belief, but apparently not.

That a completely different and silly argument. Should an employer be allowed to raise an employees wage? Yes, sure.... but no, if hey are allowed to modify the terms of employment hat must mean they’ve also should have he right to steal employees first borne!!?

You trying to argue against fingerprinting, a identification practice so damn common that’s almost everyone currently has a device in their pocket using it, by saying “but what if they then adopt something completely unacceptable!!?” That’s not an argument against the simple known technology, it’s just an absurd slippery sloop argument where you pretend everything is one giant variation of similar actions an therefore nothing must ever change for fear that this could mean over negative changes could come.

I was trying to use an absurd example to point out that it's not unreasonable to set some limits on what an employer can ask of a (possibly potential) employee.

I was not commenting on what those limits are or should be. I was only pointing out that they exist.

I don't understand how this relates to your own example. You seem to be trying to say that a contract is either completely mutable in an unlimited way or else totally immutable? I don't see how that's true at all. There are many limits on contracts already, and yet they still change frequently as situations change.