The ultimate purpose of the shutdown is to not overwhelm healthcare providers, so people who need treatment actually receive it rather than die waiting in an overcrowded ER. So yes, they would fare better in a shutdown with lessened spread of the virus and fewer people putting strain on healthcare.
Why didn't you respond to the actual point? What do you think is going to happen to people with chronic health conditions in a depression, or when supply chains stop functioning? What happens when (random example) e.g. anti-HIV medicine shipments can't be made and we start to get new mutations in those diseases?
Do you just assume we'll treat chronic health issues as a priority in a depression? I'd like to think we do as well, but the point is that things may well just stop working.
People with chronic health conditions outside of the coronavirus aren't going to get much care in a crammed ER run on triage and therefore serving acute cases rather than chronic if we don't attempt to limit the spread. The staff shortage is worse than any supply shortage. In a healthy economy free of pandemic, CA is short on doctors and nurses.