If you’re fine paying a premium because you value a smaller form factor than a typical tower then sure go ahead and get a steam machine. But that seems like a steep price just to have a smaller machine.
I’m not going to start posting a bunch of different computers and then have us get bogged down nitpicking the specs. Go look at a couple of vendors and compare prices. The steam machine is just not competitively priced IMO and you don’t need their hardware to get the same experience when bazzite exists and runs great. Plus they will probably do a major release steamOS for desktop again soon anyway so you can likely boot that up soon.