It's always possible to make it shorter to help communicate a main idea. (However, it does takes extra effort to extract the essence of a long piece.[1]) Your essay is ~15,000 words and desperately needs a short "elevator pitch" of its main points. I'm a very verbose writer so when I think others' writing is verbose, it means everybody is going to drown in the text.
Here's my summary of what I think you're trying to say:
1: There psychological problems with deadlines and large bug lists that cause counterproductive results
2: I discuss 2 psychological "tricks" in software development to counteract the unwanted behavior
2.a: Estimate software by abstract units such as "points" instead of concrete units such as "time/hours/weeks". The abstract units bypass the human biases that lead to bad estimates. Use the points to determine "relative" sizes of each "story". (E.g. Developers vote to converge on the "size" of each story point.) The last step is to multiply the points by a unit of time to derive a finish date.
2.b: Do not have a big global list of bugs to burn down. The size would be overwhelming and demoralizing to teams. Instead, triage bugs into smaller "hot lists" so they "see" a smaller manageable queue to work on. Also, measuring bug fix times will eventually let you derive an "average bug size" that's reasonably accurate
The tldr would be something like "Here are 2 counterproductive management techniques with setting deadlines and assigning bug fix work -- and here are 2 ways to counteract it with management ideas that take advantage of human psychology."
Somebody else can wordsmith it better than I can but that's what I think your essay is basically about. The 15000 words are mostly examples or background ideas leading up to your recommendations (SLO vs SLA, Tesla, what I like don't like about Agile, Kanban, etc).
I recommend that you put your strongest main points at the very top to give your readers the mental scaffolding to hang the rest of your 15000 words on.
[1] "I would have written a shorter letter, but I did not have the time." -- Blaise Pascal : https://en.wikiquote.org/wiki/Blaise_Pascal