The full phrase is "the right to work in just and favourable conditions". Which concerns his workers too.
Though suggesting that Musk's "human rights" are being violated through closure of his car factory in the middle of a pandemic is making a complete joke out of both his argument and out of the concept of human rights.
Yes I read the link before I posted it, I just didn't think the full phrase added anything to my response to the OP. :)
Anyway, I would think that being unable to open your own factory while your competitors are allowed to be open when you have done nothing wrong, would be quite "unjust and unfavorable". I mean it isn't like he can conduct this type of business from home instead.
Edit:
Here is the full sentence according to Article 23 from the Universal Declaration of Human rights:
1. Everyone has the right to work, to free choice of employment, to just and favourable conditions of work and to protection against unemployment. [1]
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Paraphrasing here, but I very much read that as "Every human has the right to work in just and favourable conditions", not "Every corporation has a right to operate under equal economic treatment."
if your factory is closed while your competitors are allowed to be open that would definitely be unfair if all other relevant conditions about the factories were the same, in this case if they were in proximity to each other.
And just in case you're going to ask what proximity has to do with the matter of justice, it is because as his competitor's factories are located elsewhere than Alameda they fall under different jurisdiction, do his competitors ever have any regulation based on where they are located that they can then refuse to obey because Tesla's Alameda factory doesn't have to do it that way?
If there is unfairness here it is of the same sort of unfairness engendered by the world being a large globe with different climates, countries, governments, currencies, and cultures and where you choose to place your factory means your natural greatness of being must be hampered by the base restrictions of existence.
The irony of bringing up the right to work in a discussion about a US corporation wanting to reopen their plant. So is Tesla going to offer everyone who wants to work a job, because it's a human right? Exactly, that's not what the right to work is, neither does it mean that corporations can just be restart plants without care about regulations.
Though suggesting that Musk's "human rights" are being violated through closure of his car factory in the middle of a pandemic is making a complete joke out of both his argument and out of the concept of human rights.