Barriers to entry are what capitalism is all about. (Real world capitalism, not the utopian capitalism from Econ 101.)
Patents, R&D, trade secrets, network effects, natural monopolies... all of these are competitive advantages that capitalistic companies want to have. It's the reason that "nobody else can provide what we do". Otherwise you're just trading commodities and you won't realize economic profits.
Now I'm not ascribing any morality to this. You can call it evil if you like. Just know that this definition makes 90% of businesses "evil".
Don't forget regulation. Complex regulation with a large compliance department to dot the i's and cross the t's is a great way to keep new entrants out. Why do you think there are so few new banks?
