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.
