Dr Sproul told about having that question asked by the the late Dr Gerstner, during one of Sproul’s seminary classes. (And I am paraphrasing)
Sproul answered, with a meek, questioning voice, “Because we are commanded to do so?
Gertsner replied, in a sarcastic, bombastic tone, “Mr Sproul, do you mean that just because the King of all if creation commanded us to do this we should do so?”
So yes, because we are commanded to do so. Because we are given the privelege to participate in Hus redemptive plan.
>>Sproul answered, with a meek, questioning voice, “Because we are commanded to do so?
Excellent answer. That sure puts that conundrum to bed.