Even if you interpreted the bet generously to allow for a browser to render the content using JavaScript, if I understand the bet correctly, the condition of working with a command-line tool like curl would fail.
I can see how other interpretations are possible, but I don't see anything especially generous about mine. I'm not "allowing" anything: To make a judgement you have to pick a web browser to try it with, and you'd probably pick the most popular one, in the most popular configuration, that seems the most fair. If that web browser happens to execute Javascript when you navigate to an URL, then that's just how it is.
(Though, that said, some approaches to rendering sites via JavaScript would still have that text in the initially downloaded HTML file as JavaScript data.)
As for the "or", I read it as "doing either X or Y must", not "either X must or Y must (not necessarily both)", but yeah, I can see either interpretation being valid.
Now I'm a human slave copying text from web browsers to chat windows to get around JS rendering bullshit.
But I do the same as GP, just on the receiving side. That is, reaching out for help to baby eldritch entity, because that's healthier for my mind than dealing directly with the unspeakable horrors that half the websites are today. The industry has lost its collective mind in pursue of profit and control, and that was long before the thousand-mask wearing shoggoths became our daily consorts.