Since on Passover we became a nation, we must immediately stamp out pride & Ga’avah as we embrace freedom, hence Davko on Pesach we keep away from fluffy Chometz which represents Ga’avah.
Of-course gaining of freedom by Yovel was also a serious concern, hence the Eved awaits a further 10 days from R’H thru Y’K to attain his freedom, when the fear of the Asseres Yemei Teshuvah should help him steer away from Ga’avah.