That doesn't really follow. Companies are run by people, and people have a bit of a history of doing unwise things, often repeatedly.
I would suspect that it probably offers some reduction in casual piracy around release time (as compared to a game with no DRM that you can install anywhere you want as many times as you want with no need to work around anything), though that's probably hard to measure since there's no control group for AAA titles - most of them have some sort of DRM.
The downside is it probably causes significant damage to customer goodwill and willingness to buy future titles, but from the companies' perspective, that's both really hard to measure and it applies to financial results for future quarters, not this quarter, so it might as well not exist.
I would suspect that it probably offers some reduction in casual piracy around release time (as compared to a game with no DRM that you can install anywhere you want as many times as you want with no need to work around anything), though that's probably hard to measure since there's no control group for AAA titles - most of them have some sort of DRM.
The downside is it probably causes significant damage to customer goodwill and willingness to buy future titles, but from the companies' perspective, that's both really hard to measure and it applies to financial results for future quarters, not this quarter, so it might as well not exist.