Plank dock and goofy sizes

cosmic fonts: just installed. vanilla plain like I like ‘em

look at this mutt gallery. It doesn’t know who gapless is and freetube (they look solo) and that’s all right. Just released by the Cosmic peeps at gnome-look site. Looks like a toothless boxer.

Gruvbox; contrast:

Gruvbox doesn’t know who Freetube is (I think) or Gapless music…but at least a decent stab at uniformity.

IGNORAMUS QUESTION:

Does Plank interpret then render the icon theme in its dock?

Or are the Cosmic people the inconsistent icon-istas (is this a word?)

And if Cosmic is the mismatched icon size fiend then how does one explain Gruvbox where even when there was no app coverage (freetube, gapless) they all came out the same size..or was that Plank that did it?

chicken/egg question I am sorry, and curious, but by no means very curious. thank you

(the gentleman uses Cinnamon btw)