i think you're conflating:
Judging somebodies talent and usefulness in any potential match
When people say DCL isn't being judged fairly based on the former, you are straw-manning and equating the judgment based on the latter.
Now, don't get me wrong, there are dickheads out there who are giving Williams a dogs life who support Calvert-Lewin. But even that will come from the same place. They think (mistakenly) that it's ok to lamblast a 30odd something year old man, but go a bit easier on a kid.