If people want to buy an unmanaged platform, that should also be their choice, but sadly there are almost no options for that, and they all put the user at a severe disadvantage for having made that decision (of course, and to be clear, along axes that have nothing to do with it being unmanaged).

The reason government exists is that sometimes the needs of the many outweigh the needs of the few (or the one). Laws take away people's choices because we consider some choices to be dangerous, whether in the short term (direct damage to others) or in the long term (the relevancy in this context would be our laws against monopolies and trusts).