This is a simplistic argument.
Lovett's worth may be greater to a specific club rather than to Essendon.
As an example - McLean will be traded to carlton for Pick 11. I doubt many if any other clubs would give pick 11, but Carlton obviously considers that he feels a specific need.
Another example - Jonathon Brown didn't finish in the top 5 in Brisbane's B and F in any of his first 6 years. Brown was obviously a gun player, and would have attracted two first round draft picks if traded - although he didn't feature prominently in B and F voting.
Results in B and F voting are not the only criteria used to determine's a players trade currency.
Another example, Matthew Lloyd, champion full forward, kicked 900+ goals, had 2 x 100 goal seasons, won 3 coleman medalls, 5 AA, yet the best he ever finished in the Essendon B&F is 2nd.