Cenac is 19 years old, younger than even most summer leaguers. He is a developmental project. If he helps the team even at all this season, it is bonus money, even next. Where BOS is picking, you can draft more mature, NBA ready players but likely with less ceiling, or you can pick someone like Cenac, raw, not mature at all, but with ceiling. Either can work out, Pritchard is an example of the former approach that worked out.
Cenac, Walsh, Hugo are all example of picking younger, developmental projects. They will not all work out. Hugo looks great, Walsh kinds of OK, Cenac TBD.