I think your examples are unfair. Getting stuck on needing the perfect architecture is closer to scrapping a building plan because it wouldn't hold up to a 2km asteroid strike than it is building something that will ultimately kill people.

Also all of your examples have wildly different impacts than a dev "portfolio project". They all cause physical harm to people, which a poorly coded website/cli tool/etc almost certainly won't. Unless this person's hobby is writing code for MRI machines, in which case, go ahead and make everything is perfect, but that doesn't seem to be the case here.