It's right there in your copy-paste my dude, "BY DEFAULT".
The jackass(es) who actually was at risk went the extra step to enable IP address logging, which means that when Proton had to comply with a lawful court order, they actually had data to give.
Proton is a company like any other that has to comply with laws in the country they operate in, but unlike a lot of other companies, they don't log data UNLESS YOU ASK THEM TO.
Moral of the story is, like has oft been repeated, know your threat model and plan appropriately.
Too late muchacho... you're already giving real big superiority vibes here