The name for this is crony capitalism. Policy that benefits businesses instead of policy that benefits markets. Luigi Zingales's book "A Capitalism for the People" is a good read on the subject.
Are they superior products? Meh.
Would you particularly miss them if they were destroyed? Unlikely. Somebody just as good would come along by and by, or one of the other ones would rise to replace them.
Are you gonna pay for them anyways? Bet your ass you will.
A simple, if specious answer: The Golden rule - she who has the gold, makes the rules.
Typically at least effects of scale and cartel-like contracts with other major players.