The problem with Morse code is that it took training and practice to become fluent and competent with it. Add in procedures and shorthand codes and there's even more to learn.
All that: INT ZBA K jargon meant that it became a skill of telegraphists, provided they kept in practice.
It's a big step from: "Primary Morse receiving, stand by - Read..." plus there's learning to send with the key as well.
It's not even Dots and Dashes either. Because Morse is an Audio code really not a visual one. The "dots" are a dit bleep and the "dashes" are a longer bleep about 3 dits long. With a gap between letters of about one dit and between words of one dah. In fact the dits are so short that when they run together they're just di, with only the last one sounding like a dit. Such as the; "di di dit" of S (Sierra) as heard in di di dit dah dah dah di di dit of SOS.
Newcomers are not going to learn this in a day. Even if they did, who would they communicate with?