Yep, in reality with this and even the farming jobs. The truth is "wages that Americans won't accept".
At competitive wages, you can always find people willing to do the job.
Also, if one have to drive all around town to buy a car, one must live in a pretty desolate area. I generally go to one place and see Honda, Toyota, Kia, etc. Then I go to another place and see Mercedes, Volvo, Lotus.
Honestly, if we were all willing to payer the suggested retail price for cars, as Tesla wants us to, then dealers would not be necessary. But as the art of the deal for the automobile is ingrained in the current US culture, we have dealers.
Correction - (memory is slow)
He puts in a oxygen mask only at first. This is what causes the O2 leakage. Second time around after explosion he puts on his full spacesuit, which doesn't leak O2.
Well not exactly. In the book explains that the HAB had excellent CO2->O2 converters. Mars Atmosphere is 95% CO2. It just requires energy, which comes from solar panels. So he had near infinite O2.
The chemical conversion he does involved turning O2 and Hydrogen into H2O, which basically just involves burning Hydrogen. But burning hydrogen is very dangerous, so he puts on his spacesuit and empties the room of all the O2 (which requires a good bit of tricking the computer system). And slowing feeding the system just enough O2 and H to burn into water.
Unfortunately he forgot that his spacesuit slowly leaks out O2 when he breaths out. So the room slowly filled with O2 until it reached a critical point and the entire room exploded. Much bigger explosion than in the movie apparently.
The problem was this is expensive. In particular you generally have one or more very expensive persons who main duty it is to keep up the computers, which was not normally a full time job, except if computers started failing in bulk, when there was enough people to get it fixed quickly.
Back then there was no standard solution. I recall when the first compaq adaptive load balancer was installed. It seemed a competitive advantage could be gained with the right combination of hardware and custom software. Now there does not appear to be any advantage at small scales. These types of servers are routine and we know what works and doesn't. There is no reason to run hardware when software or sales is the business. Even, for the most part, people used canned software unless their business is software.
"There are things that are so serious that you can only joke about them" - Heisenberg