I don't see what that has to do with not using spell check. Wyclif is not criticizing the author for not knowing English spelling--he's criticizing him for not using spell check.
There is more than just a few typo. There are myriad grammatical errors. I don't know how well grammar checkers have improved in the past 5-10 years, but I don't recall MS Office being all too good at catching grammatical errors or being able to recommend correct solutions.
