This is absolutely uncalled for. Álvaro is a long-time Emacs advocate and maker of packages, long before LLMs. I guess that's why some Emacs adepts, despite their long-time commitment and contributions, refuse to be called "programmers", notably Prot (Denote), Karthik (Gptel) and Jonas (Magit). They all keep saying they are not, maybe just to avoid this kind of ungracious stigma from random people.
Some FOSS developers are one of the rarest kind of people we need to cherish and respect. They who sustain unpaid, often thankless maintenance work on important infrastructure for years, sometimes it becomes their life purpose, with zero direct financial reward, while fielding entitled bug reports. They don't anticipate any recognition, but at least let's not call their work substandard, it's not like you're getting taxed for using it.