First of all, I'm quite sure the manufacturers have their voice in the meetings when new regulations are thought up.
Also, this Hyundai thing is fairly new. Earlier this year Adamo spoke positively about the new rules
https://dirtfish.com/motorsport/wrc-...has-ever-seen/
Also interesting quote from him:
If someone at the top of Hyundai (the car company, not the rally team) decides that they are not supporting rallying anymore, it doesn't matter if they should be driving Rally1, Rally2 or Rally5 cars.