Seems like he wanted to stay in the smoke. For me it's pointless taking a player on loan and wasting time, money and Bielsa's knowledge for the benefit of Chelsea, who probably won't even play him on his return. In the meantime we'd then get attached to the player, as we did with White, and then Chelsea quote us a fortune to buy him. So I don't think that strategy has any long-term sustainability and alos has the flavour of other clubs taking the piss out of us.
I'd rather that Bielsa shows the same understanding, loyalty, and patience that he's invested in Roberts, Paddy and Harrison, etc, by giving the likes of Gelhardt and Bate an extended opportunity in the first eleven. At least then we're investing in our future, rather than investing in Chelsea, or the individual player's future = a waste of precious resources. Yes, White helped our immediate objective in getting promoted, but long-term we've given BHA and Arsenal a leg-up, which is shooting yourself in the foot.