Sure, but a credentialed person is more likely to be familiar with other research in the area and have expertise with state of the art techniques in the field.
So an uninformed reader (with less background than either to critically evaluate the work) should, all else equal, prefer the analysis of an expert. That's not to say the expert cannot be wrong, but a non-expert has a greater need to establish the credibility of their argument.
Because by doing this you have misrepresented the truth in order to extract more money from your employer than you agreed (presumably, in your employment contract).
(As I commented elsewhere, whether you think paying by local cost of living is the right policy is valid to debate but isn't the point here.)
It's uses gn, a build system developed for Chromium. That said, on an Ubuntu system the steps to build Chromium are fairly well-documented and straightforward, as long as you have an appropriately beefy system (unfortunately it's a long wait and a fair amount of RAM is required, and Googlers tend to use a distributed build system).
Executing JavaScript every frame is not that heavy, but if the main thread is blocked because of something that is, which may even be in another tab, the animation will stutter.
The animations built into the platform can run and remain smooth under a broader range of conditions, which is why they should be preferred if you don't need the level of control that running script via requestAnimationFrame gives you.
Something running with your privileges could similarly use your existing sudo ticket, or manipulate the memory of your terminal emulator, or modify your shell to grab your credentials the next time you authenticate (and pass those to sudo), etc.
This isn't tmux's fault; this is fundamentally the sort of thing that's possible under the security model of modern Linux desktops.