Ssl is like the lowest on the chain. You have the domain registrar and the end host and perhaps cloudflare in the middle - and for phishing the mail starting point. All of these are better choices to report abuse than let’s encrypt provided free ssl that’s open for any one to use. I would place that at the level of a phishing site using nginx who could realistically add code to block a list of phishing domains somewhere in their code because it might be used by phishing sites - just no.