The risk to passers by is minimal. But as to the process. Tig has its place and it has a place in a career. I know a couple really good tig guys that wouldnt know which end of a rod was which but this has a lot to do with intent. If a guy is specializing then he is, same for mig, know some mig guys that dont know much else.
A guy retiring and learning some welding is different than a young guy gonna be a career welder in the construction biz. I have worked with buzz boxes, also premium machines, all the way from **** spreaders to nuke and back to spreaders. On a nuke you can find a spot where all you got to do it stand and twirl a tig torch but some of the top hands and jobs were combination, 2 tig passes and sticks out.
Some tested in both. If a guy is in the career and a compulsive job hopper he gets a lot of forgiveness when he is a good stick welder, it really stands out from the part timers especially where welding s part of the process, farm, signs, repairs of all kinds.
My Bud John and I stop by some aquaintance types, they fooling with a buzzer, swearing at it, the rod is junk, the machine etc. I wasnt gonna say much for a change other than it isnt the machine and one of them smarts off,, think you can do better. I looked at John,,, he grabs the hood, cranks it up 70A and smokes a big ole fatty.
John has a 2 car shoved full of stuff, his welding bench is about sq ft of plate welded to a pipe stand, he can clamp something to it, can move, he is an expert that doesnt have a big bench. About like that thing in pic 2 from lilred above.