Even though we live in an age of spell checkers and grammar checkers, it is still necessary to be able to know how to proofread what you have written so that you, yourself, can see if you have worded a phrase improperly, or in a way that is not going to come across the way that you intended too.
There is also a difference between having a typo and having a word that is “purposely” misspelled.
Sentence: I always feel ridiculed when users comment on my horrible spelling.
Typo: I alwsys feel ridiculed when users comment on my horrible spelling.
Purposely misspelled: I always feel ridaculed when users comment on my horrable spelling.
With the typo, the person has just happen to keyed in the S which is directly beside the A and is an easy mistake. The misspelled word though does not have that key close to it at all, and cannot be taken as a typo. Yes, you may type fast, but if you are always getting mistakes, maybe it is time to slow down and type accurately.