To be fair, they're not slapping it on multiple rides without testing its reception. They're adding it onto Galactica to see the reception, but that's it. Derren Brown is using it, but that comes under the category of "been done purposely to bring multiple elements together to give a full experience".
Also, I'm sure they've looked at the very positive feedback that Europa Park have received for putting VR on one of their rides. Don't see anyone moaning about Europa adding it on multiple rides, but then it's not fashionable to moan about Europa Park is it