Banning travel isn't a magic cure-all that guarantees zero cases, it just lowers the initial caseload. That's extremely important because exponential growth is extremely slow in the beginning -- it takes as long to go from 1 to 100 as 100 to 10,000. If banning travel reduces 100 starter cases to 1, you double the time you have.
I was thinking more for data gathering purposes and so on before the healthcare system collapses under the weight of exponential growth. But I take your point.
Every little bit also has a cost, and it's possible for the cost to outweight the benefits, especially when a decision is made without even considering the cost.
True and fair point with which I agree. I don't know all the considerations that went into this decision but I lean towards supporting such plans that limit unnecessary chances for exposure
Problem being, best information is there is no solid numbers on initial case load in the US, for structural reasons. So while your argument may be correct, it may be too late for this to make a difference (perhaps with equal likelihood, but we don't know.)
Yeah, I'd agree with that. At this point it would help a tiny bit, but only because it slightly decreases links between people, like a social distancing measure does.