The U.S. government isn't a monolithic entity (at least when it comes to domestic policy, and especially when it comes to antitrust regulation). State AGs can bring antitrust cases, for example, and it's a big stretch to say every single one of them is on board with every single U.S. monopoly just continuing on untouched. Even if the relevant decision makers don't actually care about corporate power one way or the other, careerists are always out there looking for a way to make a name for themselves.
Some parts of the government do want to enforce antitrust laws; they're just the minority, and they're hampered by so much of the government being too old to comprehend the extent of what tech companies are doing. You're absolutely right, though, that there are a lot of insincere threats made with the intent of gaining cooperation with law enforcement and the intelligence state.
The U.S. government isn't a monolithic entity (at least when it comes to domestic policy, and especially when it comes to antitrust regulation). State AGs can bring antitrust cases, for example, and it's a big stretch to say every single one of them is on board with every single U.S. monopoly just continuing on untouched. Even if the relevant decision makers don't actually care about corporate power one way or the other, careerists are always out there looking for a way to make a name for themselves.
Some parts of the government do want to enforce antitrust laws; they're just the minority, and they're hampered by so much of the government being too old to comprehend the extent of what tech companies are doing. You're absolutely right, though, that there are a lot of insincere threats made with the intent of gaining cooperation with law enforcement and the intelligence state.