That is excellent news for yours and neighboring countries. Our states, which are more similar to most other countries than the US as a whole, vary tremendously. It is more complex. State governers are the ones with authority and responsibility regarding the epidemic. The federal government can only support them with supplies and offer general guidelines to follow (obviously there is much more to each branch and their relationship, but this is the primary function at present). So when discussing the US response, it's important to think of it less as a single unit, and more a collection of units doing slightly different things. What happened to New York clearly didn't happen to Montana, so when and how New York can begin focusing on its economy should not be when Montana gets to as well.
I don't have anything close to what I consider sufficient data on this issue to make any judgments, even hindsight ones, and I tend to look at anyone who does (without resentment or malice) as fools. We have variable COVID19 models, but not much in the way of variable economic lockdown models, or variable lockdown mental/physical health collateral damage models- in addition to the negative impacts inherit simply to economic downturns. There is a gaping void of data in the area in which we currently need it. Even spending the entirety of our focus and investigative efforts on COVID19 alone has so far yielded a fraction of the data we need on the virus. The time we are currently spending on acquiring the data we needed yesterday may be outpaced by the ultimate cost of that time.
If you're working on an electrical system it might be safer to shut it down before operating on a problem, but shutting it down can cool older solder lugs on circuit boards not used to not being run, and end up costing you more than the possibility of a little zap. If you're working on an automobile and take too long to get it back on the road, oxidation on static components that are used to moving can fuse metals together which will then break once restarted. If you drain a water system and allow it to dry out completely, any rubber seal in the system will have a chance of drying out and splitting, causing a leak once turned back on- some of which, if hidden in walls, can wreak incredible damage. National economies, especially the US, are much more complicated systems than those- but the isometric pattern in systems, of unexpected damage that often exceeds the immediate benefit of shutting an entire system down, is worth concern. My brothers and I, who I work with, call this the "don't touch it" rule: The less you can disturb a system you are trying to fix, the more effective you will ultimately be at restoring it.