What's Judaism's keyword? Community control?
What are most of the gederot in the kosher rules for? To prevent intermingling with other types of people.
What are most of the gederot in the rules of shabbat for? To keep the community in line.
It seems to me that the fact that orthodox jews like to marry so young is a tacit admission that orthodox judaism only makes sense as a family/community religion.
When you are single and unemployed, it can be helpful by providing a reason to wake up every morning and maintaining a sleep cycle (to get up for shacharit) and a reason to socialize (while learning torah) and to soooooooome kind of extent it can keep the brain active (while learning torah).
However, when you are single and EMPLOYED, all that becomes irrelevant and you wanna do your own stuff. Orthodox Judaism does not even seem to be made to be a personal religion.