Not everyone is so rich. People should have the choice about whether or not they want an unnecessarily expensive house. Regulations assume one size fits all and that everyone wants the same thing This isn't true. and trying to outlaw poverty doesn't work, it just makes things worse.
I wouldn't want to live in a house that was unnecessarily complicated to point of doubling it's cost just because of endless regulations forced vast increases in costs. You should see one of the links shared above: it talks a great deal about what's driving the increased costs in housing and it's all to do with increased building complexity, much driven by regulation.