Abloy does not have an exclusive monopoly for two reasons. 1. You can get your locks keyed to a select number of suppliers. Abloy being jusT one. 2. Your block will have its own key to the electricity room. It can be copied by any competent locksmith.
I’m not sure of your reasoning here? If the big utilties companies insist on using Assa Abloy keys, how does a strata scheme avoid changing its locks.
Maybe I’m missing something but it’s worth Googling “Abloy monopoly” to see similar complaints in other countries