This is a bad take that doesn't account for the legal definition of copyright.
The first step of training an LLM, going from the source to a tokenized input array is creating a derivative work. Unless that's something that can be shown as fair use (the most likely exception, but there are others), then ingesting items into an GPT is probably a copyright violation.
https://www.copyright.gov/title17/92chap1.html#106
106. Exclusive rights in copyrighted works
Subject to sections 107 through 122, the owner of copyright under this title has the exclusive rights to do and to authorize any of the following:
(2) to prepare derivative works based upon the copyrighted work;
https://www.copyright.gov/title17/92chap1.html#107
107. Limitations on exclusive rights: Fair use41
Notwithstanding the provisions of sections 106 and 106A, the fair use of a copyrighted work, including such use by reproduction in copies or phonorecords or by any other means specified by that section, for purposes such as criticism, comment, news reporting, teaching (including multiple copies for classroom use), scholarship, or research, is not an infringement of copyright. In determining whether the use made of a work in any particular case is a fair use the factors to be considered shall include—
(1) the purpose and character of the use, including whether such use is of a commercial nature or is for nonprofit educational purposes;
(2) the nature of the copyrighted work;
(3) the amount and substantiality of the portion used in relation to the copyrighted work as a whole; and
(4) the effect of the use upon the potential market for or value of the copyrighted work.
The fact that a work is unpublished shall not itself bar a finding of fair use if such finding is made upon consideration of all the above factors.
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What will the courts decide? Who knows. It's probably going to be a fairly massive case regardless.