I think you'd be shocked to find that on any results-oriented resume, it's nearly impossible to objectively prove essential and sole causation of positive results. A sales rep bringing in $10mm/year in deals is a great achievement, and a hiring manager may ask about the details, but just because you needed marketing, a good product, and biz dev to warm the pipe doesn't mean that you are bullshitting when you claim those results and talk about your impact on them.
> usually the engineers are the ones who are collecting and researching these metrics so it's a conflict of interest: an engineer is never going to mention the downsides of their work in such statistics
Yeah, that's called effective self-marketing, and everyone does it.
> I'm saying if I saw those "facts" on a resume (or as a manager) I'd ignore them all; they don't sound objective at all to me but more like good sounding pseudo-truth to give a low-competence manager something to work with.
Thoroughly disagree, and I would hope as an engineer to avoid encountering hiring managers who would harbor a prejudice against engineers who can identify and speak cogently about the impact of their work.