The doj doesn't have a basic understanding of how computers work, how networks work, how computer security works. They cannot effectively regulate a world they do not understand.
In this case... the largest submarket of....computers.
If you think one can regulate the market for X without understanding how X works... you should work at the DOJ or FTC. Lina Khan has a job there waiting, I'm sure.
If you think the regulators understand nothing about computers, operating systems, app markets, privacy, and security, then I'd say you should go get a nice consulting gig with the DoJ because clearly you are more informed and insightful than even their most senior resources.
Half the people on hacker news are more informed and insightful than ftc/doj in this domain. They are clueless. And they don't pay well. Half the people here would be taking a pay cut to get involved with them.