The reality is that there's a vocal minority (looks around here) and the vast majority of people couldn't give a shit less.
Not once in my life has my dad, my grandma, or some random friend I met up with at a bar gone "jeez, Apple and Google sure do have a monopoly on pricing in their respective app stores and this harms me as a consumer". Nobody cares. In fact, most people probably think everything is amazing how it is now and don't think there's a problem. Personally, I'm knowledgable enough and I think things are way better now than they might be in a future state where this is changed. I know exactly what is going to happen. They are going to be forced to allow competing app stores (in the case of Apple) and then everybody I know is going to have like 5 stores installed, garbage apps spying and harvesting personal info, and it's going to just be a shit storm of stupid knock-offs, crappy products, and outright theft. There's no way around it and if you don't understand that you're now going to have to fix your grandma's iPhone now because Facebook wasn't on the Apple App Store but was on the whatever App Store you're living in a fantasy bubble where people are even moderately technically literate.
There's just a few disgruntled developers who don't like the rules so they complain loudly, and some billion dollar corporations who can make some money if they win legal cases. Small, but vocal players.
Unfortunately that's how a democracy in a country as large as the United States works. Most people don't care about something so one group can just shout loudly and eventually get their way, even if it is bad for the country as a whole. Then they get entrenched and laws are nearly impossible to repeal now. Then we overcorrect and pass new laws, but then these laws have loopholes or carve out exceptions. /rant