Though this practice provides a means for the respondent to make his (or her) erudition plain for all to see, it is not in my view the best teaching practice.

Stackexchange is not a teaching site. Its purpose is not to teach (physics in this case), but to answer a question.

Note that the level of questions and answers on the physics stackexchange vary wildly, from beginner high school level to a professional/academic level. What may work as a "good" answer to one person may not work for another; what may help one person to understand physics better may not help another.

If you want to learn physics, I would instead direct you to didactic books, that start at whatever level you deem appropriate, and build from there, rather than jumping in at very disconnected points.

Though this practice provides a means for the respondent to make his (or her) erudition plain for all to see, it is not in my view the best teaching practice.

Stack Exchange is not a teaching site. Its purpose is not to teach (physics in this case), but to answer a question.

Note that the level of questions and answers on the Physics Stack Exchange site vary wildly, from beginner high school level to a professional/academic level. What may work as a "good" answer to one person may not work for another; what may help one person to understand physics better may not help another.

If you want to learn physics, I would instead direct you to didactic books, that start at whatever level you deem appropriate, and build from there, rather than jumping in at very disconnected points.