I would rather say the argument is simplified, but on a decent track. Because there are two angles to it.

I've been wondering what sectors I wouldn't maintain and develop infrastructure for, because I consider it a strength of mine that I don't entirely care about that. I'm not excited about your product, for good or bad.

Defense for example is on an edge there. Supporting the creation of death and suffering in other humans does not sit right with me. Being defenseless doesn't sit right either, as it can create suffering and death for people I know as well.

Online gambling is more on the nope side. Maybe with a decent regulated german company, but if you start working with some eastern-europan online video gambling sites with pretty girls as dealers, you are suddenly very close to human trafficking and many more things connected to it.

So I guess directly causing human suffering and pain is a boundary for me. And yes, if you push that argument to an extreme, if you search long enough, you realize that pure existence causes suffering to other people, animals and the planet and must be ceased.

But then there is that other side - in the current system (and arguably many before) you have to do a job to get money to live, and a lot of people like the person making cars have no choice about that. I guess we are contributing to that suffering as well by existing.

So, minimizing the direct suffering and pain I cause seems to be a sensible directive.