Sounds like your argument boils down to I did not have to I chose too, I got that luxury, but you...you dont get that luxury, you get forced into it.

Your analogy to combat skills is perfect so tell me what combat skill allows you to skip Skill 2 and go from 1 to 3?

If you need to learn all of the lower skills to learn the higher then why is it not uniform? Further why is it with Carpentry only applied to the "weapons" and not the other tiered items?

You could also make a case that what does max enchanted 50 gear have to do with max enchanted 60 gear or 70 gear? the wood is different so is the "skill" required, its not even like blacksmithing or toolcrafting where you can make A and then use A as part of the items needed to make B.

Why Carpentry and Fairy Spring Armor alone? if you are confident in this line of logic then it should be applied to all crafting skills otherwise your indecisiveness is actually a logical argument against having it at all.

As it stands I do not think it makes logical sense for these few skills to be singled out, either all or nothing, but hey I base my arguments in logic.