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How is it hypocritical? Sanji vs Jinbe is comparing subordinate vs subordinate. Leadership, territory and influence don’t matter since they’re both subordinates.
Shanks vs Mihawk is captain vs ‘subordinate’. Mihawk is the actual fourth yonko and would be the one fighting if another yonko threw down the gauntlet. The WG explicitly credits Shanks’s bounty to his crew, while crediting Mihawk’s swordsmanship in his bounty. Mihawk’s bounty would likely be higher than Shanks if they knew he was the real martial leader of Cross Guild.