MLB organizations are the worst at sunk costs. If they offer you 7 figures, they are going to give you every chance and then some to make it.I don't know the Christos personally or have any inside info. On the surface, there could be some things favoring college. Drew is the epitome of scholar-athlete. Finished 1/329 in his high school class, and got a 35 on his ACT. Now that is impressive. And, the family is fine financially, so there is no short term need for funds. Having said that, if he is projected top couple of rounds and a 7 figure signing bonus, anyone would have to look at that; one could go to college anytime. My guess is he'd have to go really high in the draft, with a bigtime offer, to go pro. That could happen.
If you get drafted out of HS and get offered 7 figures, you take it.