Until you provide a single source you're not saying anything worth responding to.

But piracy is naturally increased by limiting legal sources for buying something. Other developers commented on this very issue, saying that existing DRM increased piracy.

It was also not bought by people who see this obtrusive nonsense which drains CPU resources and degrades performance as something to avoid. In the end, they only lost sales. I wouldn't call Ubisoft or any other legacy publisher rational. Rather irrational control freaks.

Besides, Ubisoft's DRM will be broken, same as all others.

It's boring that you support anti-user methodology like DRM and try to justify it. It's been debunked multiple times.

There was a time when you couldn't find most games in a physical store, and sketchy cracked versions on PirateBay or your favorite tracker were the alternative. Of course, I have orders of magnitude more disposable income now than I used to, as well.

Some do it for sport, especially DRMed ones. I.e. they see DRM as something to break. So the mere presence of DRM is an incentive to pirate for them.