You have to accept the rules put forward in the setting of the world, to judge them within the context of the world itself. You can't apply outside morality to make an inworld judgement. Sure, on the face of it as well, the fact Jedi basically use Child Soldiers, taking their Padawans with them into dangerous situations would be considered horrible by real world standards.
But then we don't live in a world where people are born with magical powers that can hurt everyone around them... and Where the Forces of Good and Evil are tangible.
We know in the rules of the world as it's established, Jedi are Good and Sith are bad.
We also know from Primary Sources, Jedi were celibate, and with the EU wiped out and the new Trilogy being established, Luke kept that practice going. Leia while obviously learning how to use her Force Powers, never actually became a full fledged Jedi like her brother. She also never used her Force abilities except in cases of extreme emergency.
Now when the EU is brought in, things get all kinds of weird and different, with even different Graded levels of Canon for them, but that's neither here nor there. Just going with the Primary Sources, this is what we know.