Sure, I doubt anyone who in the history of programming has even fired up a headless browser and thought "whew, I'm glad that work is finished, never to be touched again!"
But if it's a choice between _me_ (a) remembering every 3 months (b) then opening Chrome, authenticating, recalling the 18 clicks to get to the right settings screen, copy-pasting the 3 text fields, hitting submit, then logging out, or puppeteer doing that, there's absolutely no contest which of those is the better use of the company's series-A
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Separately, I'm not sure where this falls on the HN etiquette guide, but the word is "scraper", because a "scrapper" is someone who collects and recycles metal: https://en.wikipedia.org/wiki/Scrapper
Headless browser is only solution if upstream website don't change their ui and is very stable.