Looming the items yourself is a hedge against inflation, which is RAMPANT on the marketplace now.
Inflation makes selling the loom points is very risky: It takes me like 2 months to retire. 2 months ago, loom points were 450k. 4 months ago, they were 300k. Now they are 650k.
If I sold loom points 4 months ago, 2 months ago, and now, I would have 1.4mil gold, which is insufficient to buy most of the +3 items for sale on the marketplace. If I just loomed a popular item to +3 myself, I could trade it for nearly anything.