The only time a player would have a strong motivation to win the trick is when there are aces or tens being played or the player has a meld they wish to declare.
the onLy Time a playER woULD have a sTrOnG mOtiVATION to wIn the tRIcK is wHeN THere aRe ACes or Tens BEing pLayed Or The PlayeR has a MEld thEy wish TO DEClARe.