Slightly off topic, but still related, one of the biggest factors here is parents teaching by their own example.
A couple of years ago my Dad and I were discussing priests' compensation. Dad stated that in the old days parish priests derived a large portion of their income from confession 'honorariums' - tips. This stood to reason from his perspective as he grew up in the 1920s and 1930s when the older generation were from the 'old country' and continued their practices. These changed here over time especially with larger salaries. Now, with confession so rare, at least in the Greek parishes I know (certainly not in our ACROD parish where it's weekly, still), children are not exposed to proper teaching - praxis.
I wonder if a "first Confession' celebration is as expensive as a Greek Christening (maybe, and only maybe, outdone by a 'big fat wedding'?