I am surprised at how many people argue that spelling and language skills in general do not matter as long as the message is communicated. Words do matter. Language matters. Etymology matters. Spelling matters.
I’ve put out tens of thousands of pieces of writing over a career that began in the early 1980s. My career was built on written publications. Yet I’m not aware of any piece that was published without an error. Mistakes happen. That’s OK, you can survive. But the attitude that these issues are not meaningful to begin with does matter and places us at significant intellectual risk as a society.
I suggest the books “The Mother Tongue; English and How It Got That Way” and “Made in America” (the better of the two, IMO) by Bill Bryson as introductory material for anyone with an interest in this topic. Bryson covers the topic superbly. I won’t even try to summarize.