"Intellectual property" is a silly concept that only exists because under capitalism massive powerful corporations benefit if they can leverage the legal system to permeantly keep knowledge, innovation, and art behind a paywall, and people in society are dependent on monetary gain to survive.
We should, to the fullest extent of the law, make it such that proper credit is given to people who make things, but calling something "theft" when the person you're "stealing" from literally does not lose anything is asinine.