It looks like the employer interpreted the message as a type of ultimatum. In the face of such an ultimatum, they basically have no choice but to treat it as a resignation.
The ultimatum is a very dangerous negotiating tactic, and generally harmful to long-term relationships. As an example, I recommend against posing an ultimatum to a spouse or partner.
Edit: speaking of "ultimatums," what do you call a strike? Is it only an "ultimatum" (thus unacceptable) when one person does it, but not when a large group does it?
If they had said that they have concerns about safety, and requested an urgent (possibly remote) discussion, the employer would have more options. By telling the employer that they were leaving immediately, and not coming back until they felt something had changed, they force an immediate decision of either treating it as a resignation, or accepting and condoning unilateral actions by employees.
Strikes are definitely ultimatums, though they generally have clearer objectives, and are usually preceded by a series of discussions. Strikes are not conducive to good relationships.
Read this again, and comprehend that the HR unilaterally and knowingly subjected them to risk of contacting the virus.
Subsequent self-quarantine at home benefits the company as it reduces the chances of spread. It was the right thing to do, and there's not much to negotiate here given the initial screw-up.
I am not making a judgement as to who is at fault for the situation. I am only stating that the decisive move was the grandparent's e-mail, which left the employer only one rational option (that I know of).
What does Samsung stand to gain from this? They lost an employee (which will cost them in recruiting when they open up again) and gained bad reputation (and a disgruntled former employee).
This is power play that hurts everyone.
You do know that frequently the only reason these "discussions" are able to be had is because of the threat of a strike? What if the GP had these "discussions" and was told to go back to their desk and STFU? Then what?
Strikes are actually the result of employers abusing employees, which is what creates the bad relationships. You sound as though you believe the other way around, that strikes create bad relationships.
Do you see an alternative way the corporation could have handled this that would at least given the impression they valued the lives of their labor force?
Imagine someone gets up at their desk, and yells out: "I am leaving, and not coming back until you agree to my terms". That is the (assumed) situation here, and leaves management with almost no options.
I read "sent an email that I was leaving and would not be returning for at least two weeks and pending further info about any spread" as such an ultimatum. It is a final statement, the rejection of which will result in a breakdown of relations.
No.
The issue here is that Samsung notified an employee of a coronavirus case on their floor by an email they could only read at work.
The HR willingly and knowingly subjected the employee to the risk of contracting coronavirus, taking away their ability to make an informed decision of whether or not to come to work that day given the risk.
This is criminal behavior. Don't make excuses for them.
I'm not even sure if you pushed this hard enough as a wrongful termination that it wouldn't stick.
There is a big difference between unilaterally announcing that you won't be coming to work and having your request refused and getting fired for leaving anyway.