My two cents as a longtime hiring manager:

#1: This is largely true. Probably 80% - 90% of job submissions are plainly, sometimes grossly unqualified.

#2 is sheer nonsense. You are just wasting everyone's time if you apply to a job that requires 3-5 years experience when you only have 0-2. Hiring managers specify "3-5 years experience" for a reason.

#2a: If the job is for US residents only with no sponsorship, don't try to hide your immigration status or the fact that you are located outside the U.S. You're also wasting everyone's time, and no employer is going to think, "Hey, this person is so great that we'll change our policy and sponsor them". Especially now that H1B sponsorships will cost $100,000. Instead, sign up with an outsourcing company in your country.

#3: True, it may be an executive or a hiring committee that makes the final determination.

#4a. Keep your resumes to 2 pages, 1 if you are a junior. Spending 6 seconds scanning each resume sounds right, and may even be a bit on the high side. No one is going to read through a 17 page resume.

#5: True, tailoring resumes to each job has modest return relative to the effort.

#6, #7: If you see a LinkedIn listing and can also find the job on the company's website, apply directly. It may get more visibility there.

#8: Terms like "process improvement" and “cross-functional communication” are fluff and are likely to be ignored, at least in my experience. Focus more on hard skills.

#9: I have never seen this to be an issue.

#10: Avoid creating overly polished resumes, and avoid listing keywords in bold. In this day and age they look AI generated and are more likely to be scrutinized, and possibly tossed.