It is if you are wedded to a fixed number, because short of Australia nothing else has worked in the world. If you are on team mitigate (which both you and I seem to be, even if we disagree on the scope of the mitigation steps and what works), then you are doing a cost benefit analysis for every intervention in the hopes of reducing things on the margins, knowing if you compare Peru and Brazil it may not be enough to do anything.
The hypothetical I bring up all the time.....masks (y). There's split scientific evidence over whether they work but there's been no study definitively showing they do anything with coronavirus. Masks have failed to bend any of the curves anywhere (though arguably they may have stopped them from peaking too high in certain areas of the world). There's no correlation between how well places have done and mask orders. There's a split of scientific consensus on them. Much like my position on HDQ, I say use em, but only indoors and make exceptions for the very young and ideally give everyone really good masks. Why? The cost (z) is (some minimal intrusiveness, cost of manufacturing in the scheme of things is small if there is some benefit however minimal, so long as we aren't kicking off screaming babies from AirCanada flights or tormenting Downs or autistic people), the benefit (x) is unknown but there's some evidence there may be some, particularly indoors particularly if we use good masks....enough to overcome the cost at least indoors not out....what's the harm at least until it's proven definitively otherwise that they really have no benefit whatsoever. But also everyone wear a mask for 4, 8 12 weeks and the virus will be gone is not a realistic policy and not one worth aiming at particularly at the cost of young children and the severely handicapped.
The other question is how far you willing to go to enforce your no indoor gatherings? 10 years in prison, 1 year, $100,000 fine, $1000 fine, turn off power, deploy the military to forcefully disperse?