Could it also be the fact that good engineers love to optimise design? Saving another clock or a more complicated divider to achieve the required video clock r

Could it also be the fact that good engineers love to optimise design? Saving another clock or a more complicated divider to achieve the required video clock rate would be a damn good thing to accomplish. Sure money was also saved, and together with a few other such savings, multiplying them all by millions of units, would save quite a lot of money.