Everyone on here is passionate about these characters so we all get a little too into it sometimes.
And it's fair considering Clark was thinnest during their incarnation as well since he mostly was someone to shed so Clark could become Superman. Clark got developed more towards the end of the Silver/Bronze age. Not saying he was just glasses and a suit before that, but he started actually differentiating a bit later in life from the earliest stuff and I think manwhohaseverything enjoys the earliest incarnations most.