I'm not seeing anyone here talk about the actual reason that a factory owner gave: no one knows if it's going to pay off, because if this whole thing blows over

I'm not seeing anyone here talk about the actual reason that a factory owner gave: no one knows if it's going to pay off, because if this whole thing blows over (because of a vaccine, or some other treatment, or we reach herd immunity sooner than expected, etc) then they've spent a huge investment on building supply, and there's no demand for it.