shit = feces expelled waste from living things above plants. It is the foul stinky, putrid, unpleasant matter which is to be avoided, burried and disposed of, not to be around in living rooms, auditoriums or in the public fora such as on the www.
Then too, being a literalist, I see no reason for the subject of feces to be interspersed into board discussions and living room conversation etc.
I suppose it depends on what you're used to. Eschatological idoms are common throughout all languages. Whereas I don't particularly use them very often, they are quite succinct expressions used to quickly indicate a person's feelings and mood with little ambiguity. Although I grew up in a household where such language was considered unacceptable, my military service rapidly (in fact, the first day) cured me of any squeamishness.
As to the particular noun/verb you mention, I'm afraid that discussion of feces is an integral part of my job description. I spend much time closely examining scat, for instance, and spooning fresh cow manure into beer cups to use as bait. In other words, I work with shit every day, so I'm perhaps a bit less concerned than you apparently are about the "unpleasant matter that is to be disposed of". In fact, I and my colleagues often have dining room conversations on the subject.
All in all, I think you are being a bit harsh, here.