Yes, because the ordinary HVAC service runs on a "best effort" basis where some downtime or reduced capacity is acceptable and you can try and fix stuff if some

Yes, because the ordinary HVAC service runs on a "best effort" basis where some downtime or reduced capacity is acceptable and you can try and fix stuff if someone complains; but for a datacenter you suddenly need 24/7 99%+ uptime with rapid response in case of failure, because losing AC is only just a bit worse than losing power, and it's easier to have redundant power than truly redundant AC.