"SEO doesn't exist" yet Google hires SEOs to optimize their own sites AND they are not focused on getting backlinks. Go figure! https://www.thinkwithgoogle.com/advertising-channels/search/...
Polluted crawl error reports won't effect organic rankings, but they will make it harder to discover a legitimate page that is broken, but shouldn't be.
The quality score could go down which can lower rankings with too many broken links.
Google has at least 50-100 variables it checks and assigns different weights to.
quality score has nothing to do with organic results.
SEO doesn't exist because the ONLY way to optimize your website is to write good content and get quality backlinks. To be precise, 99% of "SEO" is backlinks and 1% is your HTML quality (in-page SEO).
To give you an example, you can have the worst HTML, no internal linking, to Sitemap, no nothing, but have 10-20 quality backlinks and still be #1 in Google.
I'm doing internet marketing for more than 15 years now and the proof is out there. Quoting something else from the article:
"Google will try to follow relative paths inside of Javascript, even when they don't exist. This can result in polluted crawl error reports."
So he author claims that a relative path to a URL (inside a JS call) will effect your organic results. I wonder if anyone understands that this makes no sense and especially SEO-wise.