In addition aerospace, like most other traditional engineering fields, is heavily biased towards seniority. Years of experience actually matter[1], and more junior engineers often have an uphill battle trying to convince more senior engineers of errors. In aerospace in particular it's a side effect of having systems so complex that first impressions of a subsystem can give you intuitions that are wrong in the context of the larger system, even though they may seem right in isolation.

[1] More than they should, in my opinion.