Is 'be thankful to your parents, for they brought you life' incongruent with Buddhist thought?

It appears to me that this is incompatible with Buddhist teachings. Life will bring suffering, and it'll not be a kind and easy journey. So why be thankful? On the other hand, if you weren't an arhat then you were going to be reborn in some way. If you were born in some type of affluent family with good values etc., then I guess you could be thankful.