No, it's not about a "bonus" because it's physical. erikpukinskis [1] and blihp [2] captured essential reasons for the differences in their comments, and I did so in my response to yc-krain [3]. I mean this in no way condescendingly, but if the bulk of one's technical experience is all in software with no deep exposure to the engineering lifecycle in the physical realm, it could be hard to grok the underlying theme of rigor that these comments get at.
[1] https://news.ycombinator.com/item?id=18801168
For example: one can't be certain that someone with a Computer Science degree even knows how to program or has any other specific knowledge or skills. Or that someone supposedly with X years of experience with Y understands Y at all vs. just repeating tasks learned by rote. Or that someone who went to a Z bootcamp can actually do anything useful with/in Z. Maybe someday we'll get there, but it's still a long ways off.