Ok I'll address this in parts since there are a lot of separate points.
I'm a combat type player. I raid, I run dungeons, and make new combos and rotations that are both unique and effective. My Specialty lies in the Disciples of War disciplines though I am not object to using magic when the need occurs. Most of my actual inventory is in my Armory Chest which has on multiple occasions spilt over into my normal inventory. Any crafting or gathering I do is strictly for leisurely purposes to relax from the stress of the battle field. (Thus why my fisherman is well above all other DoL/DoH classes, just take a seat by a lake, cast a bait, and let the RNG do it's thing)
Now, on to the matter of retainers. My retainers are NPC banks and Arsenals to me. Thing is, gear has upkeep, and leveling classes means I occasionally need new items. (Which is perople like your competitors come in as I typically don't buy any thing over 20-30k from the MB as 100k is difficult for me to get quickly via the spoils of war) So the quick ventures I send them on usually pbing back compleatly worthless items that sell for less on the MB than to NPCs. A lot of useless loot I get in dungeons meets the same fate.
And as for the "Throwing away" my inventory, well I'm on a very large server, Balmung, and there for unlike your server, Crafting is competitive to the point where untill you are a High End Crafter with at least one maxed DoH class, there's no profit to be made. I've been to Zodiark, I've seen your population, and I've seen your markets, High End Crafters are few and far between meaning you have a verry monopolized market where as on balmung it's not uncommon for an item that was work 15k a piece the day before to drop to a few hundred gil and vise versa depending on who'd farming and crafting what that day. The Allagan leather I sold for 35k a week ago now is barely worth 10k due to mass farming of T5 by unsynced parties.
So, I've addressed my points quite validly where as you seemed to shoot more holes in your own argument than a lvl 60 machinist on an opo-opo killing spree.
Now that we've established our differences, what is your real argument for how you have any ground to stand on, because now I'm even more convinced that I should be taking advise from a lvl 1 noob than an "Expert Craftsman" like you.