Well, we also have some excellent teachers, though I'm not sure whether that is a consequence of being a private school (do they get paid more?). They were excellent because they were incredibly knowledgeable in their areas, and genuinely loved teaching. Not because they "spoonfed" us.
If you want to use personal anecdotes as evidence ... well, not a single one of the 200 or so people I went to high school with and with whom I still have some contact have yet dropped out of university. Many of them have HD and D averages. The only people I know who have dropped out of law attended public schools. Therefore, I proclaim that public schoolers have no independent learning skills. Can you see the logical fallacies in that conclusion, and therefore in your own anecdote-based generalisations?
The "extra $30k" includes things like building fancy new concert halls with stages the size of the State Opera House, chapels, overseas trips, overpriced uniforms, free music lessons and the like. It is not the school fees which "buy the ENTER". It is the parents, who are wealthy enough to pay those fees, who therefore also have the funds to pay for extra tutors, TSFX, etc.
There are also rich parents who choose to send their children to public schools and spend the money on expensive tutors instead. Aren't they "buying" an ENTER too? Should we just ban all tutors and tutoring companies in the interests of a truly level playing field?
If you are born into a family which is not as financially well off, that is the deck you have been dealt in life. Stop whinging about it and make the best of what you have. And recognise that you don't need a personal tutor to do well. There are so many members on this site who are living proof of that.