Why is There no Agreement in Philosophy?

Philosophers cannot find any agreement on the major themes of philosophy. Questions like:
What is right?
What is real? | What is the truth?
Who am I?
Who should I be?
How should I behave?

This could, and possibly should, be seen as a scandal, but isn't.
Questions like this seem compelling and simple (and genuine), yet prove fiendishly difficult when one tries to answer them.

Not only can philosophers not answer philosophical problems, they cannot explain why they cannot answer them.

Partly, they do not like the possibility that these are not questions that can be answered, with an answer that is first of all true and false.

The working assumption seems to be, we will answer these questions in due time. Even if this seems implausible as people have been working on these very problems for over twenty-five hundred years.

So what are some possible related reasons why these question remain through recorded history?

It may of course be that the main job of philosophers is to disagree, but that this can be a job assignment, tells us something about the nature of philosophy.