Yeh a great reason to marry off 6-8 year old children so they can be raped by 40 year old men.
I can’t believe you really believe that. And seem to think its OK. Oh wait I do.
A lot of the time, there are no "solutions" (all good effect, no bad effects), only trade-offs (a positive impact here creates a negative impact there).
If bans against child marriage became rigorously enforced there, do you really think girls would uniformly be treated better?