Non sequitur: because other things are not equal Broadcasting is a very expensive business. Therefore public broadcaster expenses are likely to be much higher than those of other non profit groups.

Commercial television funds itself by lies and exaggerations that annoyingly interrupt its programming and force up the price of everything we buy. It is not in the information or entertainment business but the advertising business.
Public broadcasters are totally in the entertainment and information business.

I don’t regard that as a superior funding arrangement.