Work from home isn't really a suitable solution for some work out there. Simple examples would be work regarding infrastructures and the like. Ofc, they could postpone that, but then again just like why they opened up the quarantine, it's because a lot would become jobless if it happens. Honestly, if there was a solution so that the economy would flow once again while letting the residents of their countries retain their safety, then the government would have probably done so, sadly, this was the best solution they could come up with temporarily.
Not really, nope. If it could, then the number of infected every day wouldn't have spiked up so much, especially for countries that were relatively prepared for the outbreak. Most of the countries that are done with the pandemic and are opening up nicely are those that actually actively tested and quarantined anyone that was infected. They immediately went for the root of the problem which was the spread of the virus, so they tried to find the sources or the infected, and so they did, which basically caused the number of infections to spike down.