Some of it I recognize as being an artefact of the time, when conciseness really mattered. But it's still obnoxious in 2025.
The whole thing reminds me of D&D, which is full of classes & spells that only exist in modern D&D because of One Guy who happened to be at the table with Gygax, who really wanted to be a wuxia guy he saw in a movie, or because he really wanted a spell to be applicable for that one night at the table, and now it's hard-coded into the game.
Perl 5 is to me a classic scripting language (as opposed to an actual programming language), for both good and bad. I've always viewed Perl scripts with exactly that perspective and I find them fine/good. In contrast, I find Python to be a mediocre scripting language, an okay-ish programming language from a syntax perspective and a bottom-5 programming language in pretty much every other regard.