There's a degree to which it matters because people and players believe it matters.
I agree 'total number of slams' is very flawed as a one-and-done metric to determine greatness -- and for more reasons than you mentioned -- but people have accepted it as such and so now for the players these are the tournaments which they put their all into.
I agree 'total number of slams' is very flawed as a one-and-done metric to determine greatness -- and for more reasons than you mentioned -- but people have accepted it as such and so now for the players these are the tournaments which they put their all into.