In all honesty, it's easier to start out as one.
The thing is, the requirement are high, to say the least, and it may be appropriate to tell a player who started out at full to not go overboard with that 30 in archery(that they totally don't have).
I won't whine and complain about how difficult it is to train certain skills, everyone who starts out as one should have thought of that first. The problem is that the skills required kind of need a lot of player work.
A player starts out with 60 points, 65 if human. The collective whole of the skills requires 120 points total. I commend on Dimitri's success, and his being an unstoppable and loving, writing machine, but those shoes are difficult to fill.
As a knight, one just assumes he has those skills, but must actively work to get them. That makes it easier as the plots can get thicker and more important because big boys and girls can and have to do big things. As a squire, one needs to do a lot of just training threads. It would feel more like grinding, like a JRPG, that is made more difficult by requiring a writing capability. And with those training threads will come distractions, and contrary to popular belief, it's not easy to turn a "walk-talk-drink" thread into a "+5 Knightly skill one."
There needs to be a balance, because a timelock isn't fun to go through at all.