Why is it not right to type a text with all upper case?
IT WOULD BE TOO AWKWARD AND UNPROFESSIONAL TO TYPE WITH UPPER CASE.
As you can see above, UPPER CASE is more suited for titles, for acronyms, or if you want to emphasize a word. It will look disrespectful if you are going to compose a message using all bold letters.
Community Moderator at Typesy