I agree on the form bit. I myself take the best and worst of the player as evidence and then form an average performance meter of sorts and then assess performances against that baseline with certain factors like injury, position played, relative strength of opposition etc.
As for the rest, I can see your point of view, but in my own opinion, its an age old debate. It’s a deeply philosophical question isnt it? Are opinions right or wrong or are opinions simply…just opinions? It’s where most of western philosophy and how my culture raised me are divided. I try to work a compromise by having a rather wide tolerance level for most opinions and engaging only those I believe to be outside of the purview of my set opinion universe. Usually those which do not work within a set of basic universal value systems that we can all agree are right or wrong. But even there, the most we can do is engage. Does not often amount to much. Leaving us having wasted considerable time on an internet talking to the internet version of a brick wall.
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Source: This is Anfield