That still means people would have to buy it 6 months in, when pretty much any Denuvo game, since the last few years, had long been broken. Why should pirates buy it for 40$, when they can have it for 0?
I wouldn't be surprised if you have a large group of die hard pirates who buy nothing and then sizeable part of the Steam audience who buy games on Steam, an then perhaps people in the middle who occasionally pirate. The first group you can forget, doesn't matter how good your DRM, pretty much none of them will bite. So the DRM model must aim to make occasional pirates in to purchasers. But clearly in a world where Denuvo has been cracked within weeks for years, that doesn't work. Instead you would need to create incentives that make the legitimate version more interesting. Better price, better Steam-exclusive features, whatever.
Instead adding even totally non-intrusive DRM to the game, will give you a bad rep with a large portion of your customers, perhaps enough to make them buy other games (Steam isn't exactly underserved with new, shiny games).
DRM didn't save the PC industry, Steam did by offering better, cheaper services. This is a solved issue, the only new thing, and the reason we are talking about this in 2017, is that Denuvo had a smart idea that utilized a new principle and it took a while for people to debug it properly (made more difficult by the anti-tampering). But it's a one hit wonder, they are just trying to beat the same old horse, with no real improvements. Hope this stuff dies down again, when it's clear that Denuvo doesn't do anything anymore.
