Read my statement again:

an offline version would’ve been easily doable, as in, most online feature of The Crew feel optional to begin with.

I never claimed that it was easy in a technical sense, just in a mechanical sense. But to double down on my point, if Ivory Tower had created The Crew with the possibility of ripping out the online mode entirely in mind, then the structure and the mechanics of the game would’ve made it very easy to do so.