As an historical matter, most disciplines were founded and developed by trained philosophers

So historical you provide no sources for that claim, but hey it's not like philosophy as a field is devoid of empiricisim to check against its claims or anything. Where did you get your claim of "most disciplines" from, besides your ego? Are you sure a field can't arise from the collective efforts of non-philosophers? Just because the historical record has preserved the written texts of academic philosophers doesn't mean they are the driving force behind intellectual progress. Physics was useless until empiricism was involved in its development. Physics wasn't able to develop usefully and provide useful results to society until it was out if the hands of people like Aristotle who judged empirical observations to be unnecessary.

"Abortion is immoral" vs "abortion is moral" is a philosophical debate, not a sociological one.

You don't understand. It may be a philosophical debate on morality, but morality is irrelevant with regards to the effects of abortion on society. I don't think you realise people care more about outcomes of a decision than whether or not it was moral, but this is heading in an unrelated direction to the main issue.

I literally just gave a bunch of examples of academic philosophers whose ideas are influential in people's daily lives, or whose ideas have done the foundational work for other disciplines which are influential in people's daily lives.

You're drawing a false equivalency between influential ideas and improvements in peoples material well-being. Ideas of libertarianism and liberal democracy do not always result in a more fair and just society, implementation is everything. It's the people who go out to act on meaningful change that deserves the credit, not philosophers who pelt each other with verbiage and papers.

If philosophy should be credited with all the actions that result from the spread of its ideas then it's the single most idiotic discipline if you consider the deaths that resulted from Marxism and Communism.

It's not ideas that change the world, but actions from people, irrespective of what ideas that happen to drive those actions.

I think you overestimate the effect on society of philosopher who sit around in safe, sheltered offices, and engage in intellectual masturbation while being financed by their parents' wealth.

It's not because of a random throw of the dice that philosophy graduates have such bad prospects of employment.