5% is huge, that is 1 person in 20. 5% of the population having a bachelor's degree was enough to run an advanced society back in the 50s. For a free and easily available good that is quite a significant rate.
60% isn’t a voting group that can handle parents motivated to take care of their kids.
However, let’s dump politics.
All things being equal, saying we should benefit 5%-20% of the population, at the cost of 95% to 80% of the population, just isnt an argument we can get behind logically.
Privacy is not a small thing to give up, but it is an easy thing to give up.
If there is to be some space for people to live without real ID, a practical alternative and argument is needed.