Believe what you want, what Fernandinho brought to that side was incredible, he did the dirty work, the work that allowed the footballers to shine and do their thing, and the thing we no longer have at this football club.
Well, we saw in 2019 that Gundogan was doing perfectly fine at DM and we were rock solid without Fernandinho in decisive for the title and the treble games. So, it wasn't all about Fernandinho. It's a myth that needs to die. Kompany plus Laporte at CB was the more important factor in the run in. It's easy to see why the myth is stubborn though. People love simplistic explanations and many pundits feed them with such.