Typically teams are broken up in half during practice so they spend more time with their coach. Steele was spending time with the guards so that’s who you saw. If the camera was showing the other end of the the court it would be all of our big men doing their drills.
I would hope we realize there’s more than one basket in the gym and individual drills should probably be split unless you want Lairy shooting threes on top of Harrison working on his post moves.