You’re right. What I’ve heard is that this is basically another area with misaligned incentives: for any given project offices are cheaper to build, have fewer permitting concerns, and cheaper to manage (a few big commercial clients versus hundreds of renters), and cities may prefer them if they’re tight on capacity for things like schools – but if everyone does that, your city is unappealing and excessively exposed to the business health of a few companies or industries.