Just like how players now require lv 170 to join Ravana EX, when it was always only lv 160 during my time in the past.

If you make expensive craft gear become lv 200, then players might raise up the current lv 180 req to join Alex Savage into lv 195-200, and then the people with less gil will not be able to afford the gear and cannot join the party. (they might even enforced RMT in order to buy)

All in all, it is best to make a mixture. What if the raid drop part of the weapon which you require crafter to finish it. That would be better. So both raid and craft become necessary.