That article is confusing, the title suggests there's a difference in how "should" and "ought" are used, but besides the fact that "ought" sometimes comes with "to" there doesn't seem to be one.

The usage of ought is perfectly cromulent. I'd've cut the sentence before the "to" -it's punchier that way. Dictionaries are descriptive and not prescriptive. Fuck the man; write beautiful words.

:)