eh, GW is very predatory - yes, I'd love for them to go away.
But there are many other companies besides GW who produce plenty of tabletop wargames or just the minis themselves. Just like there are plenty of other companies that produce RPGs besides D&D. 3D printing in of itself isn't stealing from a company, it's a choice to use something else that's cheaper or in a style you prefer. It is not "killing off tabletop gaming", its stopping consumers from being beholden to one company or another for their needs.