Firstly, Chelsea. They made a conscious decision to make their academy a profit-making centre and flog on players who don't reach Champion's League level (probably 1 in a 1000). See Dominic Solanke, Patrick Bamford, Nathan Ake and all the Chelsea youngsters floating around Europe on loan. You could argue that the LFC academy has a similar outlook (Wisdom, Coady, Rossiter, etc.). As people mentioned above, the only reason young players got a look-in was the transfer ban plus a new manager who was familiar with a couple from loan periods. Even now, they have been forced to play with fire with the potential Champions League place and there is no doubt that players will be brought in now the ban is lifted.
Secondly, the progression from U23s. Atm you have two choices: send them out on loan and keep them to play in the first team squad and challenge for a place. Loans can go horrifically wrong (see Dowell not getting in a Championship team, Baningime not playing for an extended period, Connolly regressing to not being an established League One player, Virginia losing all confidence, Garbutt). There is also not an unlimited source of teams who are looking for PL youngsters on loan in any position...
On the other hand, if they stay and battle for a first team place, they have to be better than the current options as every manager and fan wants to win games and finish as high up the league or go as far in the cups as they can. So, if an EFC manager puts in Gordon and Adeniran and loses a couple of games because they got pushed about, then there will be no understanding for them (least of all here). You could argue that Gordon or Adeniran should be able to perform better than Bernard or Davies in training to get their chance to play. But obviously they aren't because otherwise they would be, if that makes sense.
Finally, to be fair, there is more than a whiff of hypocrisy when it comes to GOT academy discussions. Youngsters should be given the chance in the first team even if they might not be 100% ready for it. Now take a look at the two where that has been the case in the past couple of years: DCL and Tom Davies. Dog's abuse for both on here from some when they don't perform consistently as hoped and calls for them to be shipped out to a lower league.