I agree with your first statement.
However, as for your second statement, I would really like an example, because I am not entirely sure what you mean. (I am sincerely requesting examples.)
Unfortunately, I strongly disagree with your third statement. The time it would take to learn QM with sufficient rigor to be interesting could be better spent reading the findings of experimental psychology or learning more mathematics. For the majority of philosophers, their subject matter simply does not overlap with QM in such a way that knowing rigorous QM would help them.
Further, I agree with what paper-machine seemed to imply in their post. A little QM can make a philosopher stupid.
Of course, in certain subjects, knowing QM or neurology should be mandatory.
However, as for your second statement, I would really like an example, because I am not entirely sure what you mean. (I am sincerely requesting examples.)
Few quick examples:
A lot of philosophy of mind assumes there is a singular unified self, whereas neurology might lead you to think of the mind as a group of systems, and this could resolve some dilmnas.
Lots of traditional moral theories assume people make choices in certain ways not backed by observation of their brains.
Your willingness to accept materialist explanations for the mind probably in
I'm sure most of us are used to just being able to badger him about things in the comments here on LW, but for anyone interested here's the link.