If it's the aesthetic aspect that we're attending to, then yes the song is diminished. If it's about the message being conveyed, it doesn't matter as long as you know what's intended.
Are you concerned about spelling for the aesthetic?
I am. At least for me, it's easier to read someone's thoughts and take their meaning free of bias if they've spelled correctly. I'll admit that if someone is a poor speller then I am less likely to view the content of what they've written favorably. I'll admit this might not be seen by everyone as an admirable quality, (especially since I'd probably have no issue hearing their statement verbally) but I can't help it. I love words and language. You can still understand what someone is saying when they misspell, but the more precise your communication is, the clearer your meaning is and the more authority you bring to what you write.
For instance, let's say we're talking about music on the forum. I write "you know, I really don't like The Beetles because of X" It doesn't really matter what X is, you will probably think that I don't know what I'm talking about when it comes to music because I wrote "The Beetles" instead of "The Beatles". In this case you know what I was trying to say, but because I didn't know how to spell "The Beatles", you will dismiss my point and my further communication with you about music will be compromised.
Everybody have fun tonight. Everybody Wang Chung tonight.
I hayt sleeping. It's retarded. And pissing too. That's annoying too. Every time I set down to play a video game or read a book, I have to take a piss. Or when I'm chillin' with my friends. I have to take a piss. If I've got nothing to, I don't. It's only when I'm busy that this shit comes up.
And now I think I might have a hernia. That's not a joke, I think I might have a hernia. Again.
When people leave long drawn out messages for you to sit through and expect you to still be paying attention when they rush through a call back number, and whenever they do this they never repeat the number, they just hang up, leaving you to listen to the message all over again.