Idk why not? What’re the side effects?

Countless medications have <16% efficacy rate.

If the other options would just straight up kill innocent bystanders (e.g. false positives for legit shops) I think that is a tradeoff I am willing to make.

99% of users don't even know they're being protected. There's no promise except "we work to make browsing safer" and cutting even 5% of malicious sites from a user's experience is an unmitigated win for that user at the low false positive rate Safe Browsing offers.

You don't have to use tylenol, just like GSB. Since we're picking random analogies, I think bankruptcy and or violent crime are close to what this is stopping. I'd say if it stops just one person from losing their life's savings, suffering physical harm, or psychological trauma, yeah, your blog being on GSB is worth it.

Stop locking your door if someone can just break through the window then. I think you and the author are conflating 16% effective with 84% of sites on GSB are false positives, that's not what that stat means.