A counter argument is that the short turn around time with local 3D printing is absolutely a feature.

I've printed small stuff just to get the fitting right, before I finished the part with fillets, etc.

Also there is lots of small fun stuff, small fixes you'd never do with a 3d printer if you had to order prints online.

Example, I designed a printed a M8 nut cap with room for the 3mm sharp rod sticking out. I could probably have gotten a metal file to mill down the sharp edge, but it was hard to get at, and this gave a nice finish.