When countering someone's opinion (and please do, thats what we are here for), I think it inspires better discussion when you state your reasoning as opposed to a blunt 'No" with no thoughts attached to it. Not trying to be a dick by mentioning this, I'm just trying to help this be a more conversational environment for everyone.
I can't do much with a "No, it wouldn't".
It's because hotels are way more costly to run than empty buildings. A hotel is gonna take staff, utilities, all of the amenity supplies while having to deal with revenue management and dealing with having to keep all of those expenses going in times when occupancy dips below 70%. A soundstage is just there, at a minimal cost to Universal. The revenue alone from Halloween Horror Nights guarantees a big "profit" so to speak on those soundstages. Not to mention they only have to incur expense when someone is guaranteed to be paying for it. It's the difference between having people pay for a box vs paying for a full-fledged team of people who are on the payroll 24/7.
Tl;dr hotels are expensive and soundstages are nothing but net revenue.