Seeing as the proponents -- of regulations regarding who can trade what with whom -- first cited issue is "Affordability", categorically, yes, these regulations are about making things "cheaper".
>The government is great place to balance competing interests, especially if it's more democratic.
How successful has the US government been at balancing trillion dollar bailouts for the banking/political class and endless wars of murder? Building a system where the minutia of liberty can be taken away with a stroke of a pen unless millions of dollars are spent lobbying the political class is not what I'd call a "great place to balance competing interests".