It seems to me that there are many subtle distinctions being made worldwide, not just Alameda County. Judging what is essential is always fraught when some will say being open is irresponsible while others will say not closing is irresponsible. I will not judge; I haven't enough facts on which to base a judgement.
Most people understand that closing factories is convenient if sales have tanked. Most businesses that provide their products and/or services remotely seem somehow to keep operations going, despite quite serious potential risk issues.
From Australia to the USA Tesla has figured out how to do contactless deliveries, home deliveries and remote servicing for the most part. Further, it is quite easy to sanitize charging at a Supercharger, not quite so easy a gasoline dispenser. None of that is production, but Tesla does have some arguments that Tesla is less risky than are ICE. They also have the GF-3 experience of operating in a high COVID-19 risk environment.
Of course it is much easier to say BAD or GOOD and ignore all the subtle issues. What about employees? Are they better off unemployed? Is it safe to operate?
I am now directly aware of three countries management process in this epidemic. None of the three seem to have been handling this as well as have South Korea and China. In the meantime I am opinionated but ill-informed factually. It seems that that is the situation for most decision makers. What does 'essential' mean?