so it wouldnt bother you if he wore khakis and a polo shirt on Shabbos, because he’ll act the same, right?
Yes it would and he would never do that, because it would not be showing kovod to SHABBOS, which is a day wherein we dress in our best clothing. You seem to have a real hangup about this, and I cannot fathom why. I never said or even implied that he dresses that way when he goes to learn. If you actually read my post, I stated that IF he dresses that way, he still shows the same derech eretz, zrizus to do mitzvos and (love of) learning Torah as at any other time. There is a time and place for everything. My son does NOT wear khakis and a polo shirt when he goes into a Beis Medrash, but if he did, the quality of his learning would be the same as it always is, because his CHARACTER does not change. If one needs a “uniform” in order to keep himself focused on the task at hand and his Torah life, then he might have a problem.
In E”Y, my family members who are all extremely learned Yeshivah bochurim for decades, don’t even WEAR a suit jacket on Shabbos. They go to shul, to a simcha, etc. in a clean white shirt and dark pants, no tie,no hat. Only the chassidish members dress more in the yeshivish manner, meaning with a hat and jacket. Areivim is right – this entire discussion is almost laughable, or it would be, were it not to patently obvious how seriously some people take the concept of the levush making the man. So sad, so smug, and so wrong. After 120 years Hashem is going to really have a job changing some of those minds.