I guess you never use these words. They all used to be separate words until people started using them as compound words. It's not like there is some government committee that decided to make them compound words. People just started doing it and it caught on.
Ironically, Shakespeare invented words all the time—like swagger—and is atleast partly responsible for our pronunciation of words that end in "ed" like "faked" as one syllable instead of two. (Formerly pronounced "fake-id".) He would often make contractions of such words with an apostrophe to force them to fit his poetic verse. Like "fak'd". Now we all pronounce words ending is in "ed" with one fewer syllables.
So this comic's author is being like Shakespeare! I agree with you. Language is fluid.