Agreed with Levi on the OP topic of homogeneity in the lineup. It’s a problem that the OP kinda covers.
i agree with the posters who mainly point to a talent deficit, definitely injuries impacted performance, but there were too many guys crapping the bed at the same time for talent being a big factor there.
where I get a little lost is the spark plug rah rah stuff. I prefer to watch that style of baseball. Old school ball is way more fun to watch than the modern game. There isn’t evidence that it actually works, meaning scores more runs. Not in the way that the OP attributes the outcomes, anyways. As others pointed out, Lewis, Correa, Buxton… if a guy that is 5th all time in Twins Grand Slams in his second year not a spark plug, I’m not sure what is.