If you copied all my personal data from my laptop, I'd still have it.
If you stole it I wouldn't.
Companies steal trade secrets from each other all the time.
If you copy a secret then it is no longer a secret, so something has changed for the original owner.
Stop making up definitions and just accept that it’s stealing.
You are the one changing the definition of stealing to try and apply it to piracy.
stealing /ˈstiːlɪŋ/ noun
the action or offence of taking another person's property without permission or legal right and without intending to return it; theft.