Do you know what communism is? It's where the government owns industry. E.g. a state-run broadcaster. Nothing to do with left-right bias
Everyone is "beholden" to whoever pays their bills or decides their fate - in the BBC's case, the government.
In these days it's absolutely simple for consumers to choose whether to receive ads or not. In my case I choose to pay YouTube £13 a month to be ad-free. I think it's good value, I have free choice and I don't receive threatening, misleading, bullying letters or get threats of "officers" turning up on my doorstep if I don't subscribe.
The BBC could operate in exactly the same way. The reason they don't want to and lobby against change is that they know that in reality their bureaucratic regime full of massively overpaid leeches, making garbage that the vast majority don't want to watch, wouldn't last a year if people got to choose whether to pay or not.
The whole concept of a state broadcaster and TV licence should have died about 50 years ago. There's no excuse for it at all these days.