Seems pretty cruel to me

Today, Mrs. Kimbrough was mispronouncing "nuclear" as "nucular." When I corrected her, she said "You say to-may-toe, I say toe-mah-toe," trying to say people can pronounce things differently. But no one says toe-mah-toe, except maybe beginning speakers of English as a second language or those with speech impediments. So I don't see how mocking those with physical problems as an excuse for your ignorance is helpful at all.