A "data breach" refers to unauthorized access to nonpublic or protected data. Scraping content that is publicly viewable without logging in - or even with logging in, since an account is effectively disposable - is not a "data breach" (as far as any typical usage of the term goes).

In hiQ Labs v. LinkedIn, the 9th Circuit (US) ruled that scraping publicly accessible data does not violate the CFAA's "without authorization" clause (hiQ was bulk scraping public LinkedIn profile data - in violation of LinkedIn's ToS). The Supreme Court later specifically narrowed the CFAA in Van Buren v. United States saying "exceeds authorized access" applies to accessing areas of a system you aren't entitled to enter at all, not misusing access you legitimately have (regardless of ToS violations).

Other CFAA cases have ruled similarly - being legitimately granted access (i.e. signing up for an account, or browsing publicly without logging in, since the site is intended to be available to the public) and then misusing it is not "hacking".

So in the U.S., it's not a computer crime ("hacking"/"breach") to scrape data, and nobody uses the term "data breach" to refer to scraping publicly available data on a public site, except for apparently you.