The detail of how to do that in fair way that doesn't block other people is complex[1] - you can never cover all possibilities in a written law - that's why you have people interpreting them and making judgements. All I'm saying is the guiding light in that interpretation is copyright is there to protect the justifiable work of people in a fair way.

Somebody taking those law notes and trivially copying them to directly compete is clearly not 'fair use'.

If those notes could have been created mechanically directly from the original source - why didn't the copier do that - rather than use the competitors work?

[1] given the endless creativity of humans to game systems.