I think what he is saying is, that on a mobile device where A: the correction is automatic, and B: the user rarely checks to see that the auto correction is pro

I think what he is saying is, that on a mobile device where A: the correction is automatic, and B: the user rarely checks to see that the auto correction is proper then it makes sense to ensure the device isn't primed to change a misspelling of an innocuous word to one that may not be.