I would say you should be free to make the decision to forego the advantages working though a middle man affords you, if you would prefer the savings. That said, there’s consumer protection, quality certification (important for insurance purposes), returns, after sales care and I’m sure I’m forgetting stuff. Nothing to do with differences in the product itself, more so the guarantee of a product that does what it says on the tin.
I mean if you want. Why wait for anyone else?