I like the idea. Teams should have 1 challenge per half which they would lose if they challenge unsuccessfully. In that case, VAR will absolutely have to check it even if it wasn’t a clear and obvious error from the on ground referee. Something like the third umpire in cricket who has the authority to overrule the on field umpire. It should be that way simply because they have more data at their disposal so their decision should be binding.
The current system is clearly causing more ambiguity and referees are happy too because instead of their wrong decisions being criticised by managers, they are focusing their ire on VAR and the system. There is too much incentive for them to maintain the status quo. With so much money at stake, we should have 99% correct decisions in every match and not hide being the “clear and obvious error” clause.