I don’t think there is anything to indicate the UCI was worried about giving some athletes an advantage…and the very wording of the ruling indicates that they wanted to prevent devices that read metabolic data.
The UCI is a an extremely conservative organization and their history is littered with examples of them simply banning things because they either don’t like them or because they don’t understadn them.
When taken in the overall view of the UCI’s history, I think it is pretty clear why they banned this new tech…and accessibility is not likely it. There are plenty of devices and medicines out there right now that are not allowed in some countries but can be found in others.