Will backlinks from commenting hurt or help SEO?
I've found some sites with high DA, PA: DR 40++, dofollow but high OBL.
(Examples redacted by edit)
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Will adding a comment to this page with a link to your website hurt your SEO?
Yes, it will hurt your SEO. Good back links are all about three factors:
It is a huge mistake to pay attention only to PageRank and ignore the other two link factors.
This page is in Japanese. It appears to be about travel and spiritual. Unless your own site is in Japanese and somehow related to the subject of the linking site, it is not relevant.
I don't see a single link in the comments or trackbacks that looks relevant. The majority of them are to spammy topics.
Authoritative is all about who created the link. Links in comment or trackback sections have no authority, because anybody can create them.
Including your link in the comments section on this page is a clear signal to Google that you are a link spammer. Google is likely to make a list of all the sites that comment here. If your site appears on several such lists, Google is likely to label your site as spam. Your site won't appear in Google search at all anymore.
If you want to get links to your site, they can't be anywhere you can create the links yourself. You need to find relevant pages for your site where your link would make sense. You need to have an authority create the links for you.