A lot of people liked building big buildings in RCT3. A lot of real-world parks have "houses" along a street located at the front of the park (just look at Main Street, USA at Magic Kingdom. Six Flags over Georgia also also has buildings that kind of look like houses at the front of the park).
It just makes it easier for those people that want to build stuff like that. The Sims 4 Building Tool is not only used for houses; it makes building fences, gates, floors, etc everything easier. I respect your opinion though; just trying to explain why some people would love for there to be a similar building tool in this game
I do think the developers will prioritize what they think is most important. We can see that the peeps and their emotions are very important to them. They've already said the game has been in development for 6 months (if I remember correctly) and it will be going into alpha in March. There is still a lot of time for them to create everything we want them to create.
I agree that the management simulation is an important part of the game and I hope the developers think so too.