He did play Center his senior season but was flipping around Guard and even FB before that. The more surprising part if that report is true would be that, you know, he fell to the 6th round. If there legitimately was a scouting report before the draft from a “credible” source saying that, then I’d love to see it and to know why no team really thought much of him despite supposedly being touted so highly. The official pre-draft overview on NFL.com says, “Kelce has the mobility and mentality to make it as a reserve center in the NFL. However, does not have the size or power to project as a starter.”
Honestly, I think it depends on the rule specifically. There are certain blatantly objective things like lining up past the line of scrimmage, and there are plenty of calls where I do think the refs should have some leeway to interpret such as pass interference.