I’d like to spin this into reverse.
Imagine we have a yeshiva bochur who, for whatever reason (e.g. dry cleaners lost it, lost baggage, stolen) now needs to spend a Shabbos without a suit.
What percentage of Yeshiva bochrim (if this happened to them) would opt to go to shul in weekday garb, and what percentage would choose to stay at home due to the lack of Shabbos clothing?
I am certain that in the above case it would be better to go to shul on shabbos in a polo shirt then to not go at all.
Personally I once went to a wedding without my hat and jacket (a very “black” wedding) since my suit jacket had gotten ripped days earlier. I decided that I was not going to let my lack of a jacket ruin simchas chosson.