The Park tools are not "stamped" but laser-cut tool steel as far as I know. The finish is "phosphate" which is pretty impervious to rust while still give a good feel which is something I can't say to the highly-mirrored finish of many "high end" tools. Those Vandium chrome finishes are slippery as hell the minute you get the greasy. I really do prefer the phosphate grippy surface of the Park wrenches.

Harbor Freight tools (Pittsburgh) have a nice mirrored-finish chrome coating these days. that doesn't make them high-end tools (although I think that Pittsburgh tools are every bit the equal of the K-mart Crapsman tools these days.);

I've used the Park tools quite a bit and feel the metallurgy is quite good and saying they are 'stamped glove-compartment tools" does not do them justice.

As for how to use a cone wrench: you can sometimes get away with only using one wrench but it is often the easiest to adjust hubs in the bike. For this it requires two wrenches. Sure you can mess around adjusting the tension on a vise but unless you have a vertically-mounted vise it is hard to get the tension just right when the wheel is not in the frame.