Also, even if they do protect the vulnerable population, that only means they can stand a ~10x larger transmission rate. I don't think anybody knows how large it gets without some kind of action, but yeah, that would in theory make it possible to have milder actions.
That said, if they are indeed protect their population, I don't see how their plan differs from the rest of the world, that is trying to protect their vulnerable population too.
The earlier you start with countermeasures, the longer you can try them and see how they affect the spread rate. If you wait to impose them at the last minute, you will have to choose erring on too expensive measures or on letting your people die.
A suicide burn is when you're trying to land on a body (say, the Moon) by letting your ship fall freely, thus accelerating with gravity, for as long as possible, and then at the last second, you fire up your engines at 100% output and decelerate until hitting the ground. When timed right, you'll end up touching the ground exactly as your vertical velocity = 0. It's the most fuel-efficient way of landing, but if you miscalculate that time just a little bit, you'll end up smeared all across the surface.
Suicide burn works in rocketry because you can calculate all the forces to extreme accuracy and precision. Nobody would even think of attempting that if the error bars on your altitude or velocity measurements were +/- 1000%, or if your engine output was unstable. Trying to pull the epidemiological equivalent - timing countermeasures to keep NHS at exactly 100% utilization - seems like an impossible task that's bound to end with a disaster.
Our country is trying the other approach. Ban the sale of protective gear, and distribute it centrally. It's not working great either. GPs don't have any protective gear anymore and can't buy it on the market, as they did up to now, and talk of shutting down their practices soon, because most GPs are run by old people, and they're literally putting their lives in danger by practicing. They're only getting promises since January. They are now trying to get protective gear on black market to at least have any. They're begging the government to lift the ban so that people who're trying to get them protective gear from abroad are not doing so illegally/in great legal uncertainty.
Of course no other profession exposed to masses of people daily like cashiers, have any chance either to have protective gear, under the current system.
Flattening the curve is the idea, so that health services can deal with the critically ill. That means EVERYONE HAS TO LIMIT THEIR CONTACT, as much as possible.
If you thought capitalist society was good at distributing goods, just look at what happened to hand sanitizer. Everybody needs it now, yet it has been bought up by the few that got to it.