It doesn't necessarily force obscure tech to cover for it and arguably has more answers in OU than Hypnosis does. Here's a list of pokemon in OU currently that have commonly run moves or abilities that happen to also answer double team. (half points were awarded because defog isn't that reliable of an answer in the long term and unaware clef is absent from anything but niche heat techs)
View attachment 591585
ETA: OOPS I FORGOT WHIRLWIND SKARM DAMMIT
Now here's a list of pokemon that can answer hypnosis under the same criteria:
View attachment 591586
There are significantly less answers in OU to it, and even worse is that all of them will end up losing if the hypnosis mon just so happens to be a darkrai that has the right coverage (ice beam/sludge bomb, and ghold just loses off the top)
(this is not a defense of evasion boosting in OU, just arguing that you don't
actually have to run NU shitmons with no guard to counter it if it were released)