In a broader sense it was yet one more example of the Nazis dispersing their available resources on too many projects, rather than focusing on a proven few.
I think the point that won over the German brass on the He 162 was the fact that the "proven few" planes weren't getting the job done. The prop fighters they had were suffering under the brute force of the allies numerical superiority, and they needed to untilize their technological superiority in order to regain the upper hand. The Me 262 was complex, took a long time to build, depended heavily on materials that were in very very short supply, and was unreliable.. all things that, coupled with it not being fully employed as a fighter until it was too late, meant it never had the chance to have a great impact.
The He 162 could be built much more quickly, used much more easily accessible materials, was cheaper, and was by all accounts a dream to fly.
This was especially unwise with a project that was so leading-edge at the time - those are the ones you rush at your greatest peril, as your faulty construction examples illustrate.
From my understanding that issue arose with only one prototype aircraft, and led to a fatal crash. It was corrected, and was no longer an issue.
The notion that it would be flown by Hitler Youth (or at least by large numbers of pilots with minimal training) was central to the concept.
I think that notion is highly debateable. It may have been lobbied for with that plan in mind, but that notion was abandoned before the He 162 ever got close to production. The core argument
FOR the He 162 was ALWAYS that it was cheap, easy and quick to produce, thus they could put several into service for every one 262 that went to a squadron. The notion of kids flying it was merely window dressing for the concept in order to sell it to a desperate regime.
Otherwise there was already a well-tested jet that the veterans were flying.
If anything they should have abandoned the Me 262 and focused solely on the He 162 and other aircraft of its type.... given the relative capabilities of the two, and the numerical disadvantage they faced versus the allies, I would put my money on them being better off with the H2 162 given they could produce 2-3 of the Heinkel for every one of the 262 they could build.