Although I respect your view buddy, you seem disapointed at the idea that we are potentially interestested in a solid Keeper who is a third choice at another club, yet is arguably better than our current keeper.
As an ex coach....The average Keeper's fitness is way beyond that of an outfield player (fact)
Accept this - The average Goalkeeper, will, or can, play at the top level (depending on fitness) during an average four year peak between the ages of 29 - 34....(those stats were given in 1988)
However, add to this - because a keeper doesn't cover up to 5 miles per match (outfield players do) as a direct result, they have a longer age career.
And therefore, - we would all probably accept an idea of signing both old men, Manone and Defoe within a heartbeat.