Professions MinMaxing for PvE

I found something on the internet that's probably just trolling but i thought i would ask just in case. So here it is: Is it possible to level up enchanting get the ring enchants, afterwards abandon enchanting whilst keeping the ring enchants. Then level up Jewelcrafting get the super gems and gem your gear, afterwards abandon Jewelcrafting but keeping the super gems which are gemmed into your gear. Then just get Leatherworking for drums and something else depending on your class for absolute min maxing for PvE.
Again i am 98% sure this is false, but TBC is an old expansion so who knows, if anyone has tried it or knows for sure, please let me know.

Pretty sure the answer is no. Otherwise everyone would do this to min/max their char for pve.

Afaik it works but expensive as F.

It works in both cases. However it won't work when you eg craft a JC necklace that requires X JC skill.

Yeah that's obvious,same with engineering.Tho if you venture in this,prepare to cash out 10k gold haha easily if not more,