You joke, but I think this is actually true. If companies gave their developers of client-facing software slower computers the resulting software would end up being faster.
In my experience as a web dev, all the performance goes out the window as soon as the tracking scripts are added.
PMs and executives are the ones you should give slow machines to if you want more focus on performance.
It may not be with fewer and less heavy dependencies!
It's still not comparable with your average developer tooling in terms of footprint, was my point.