I do agree there is a stark difference between using missiles and bombs on ships versus ramming and water cannons.
However, you're incorrect about it just being fishing vessels and third parties. There are tons of examples of Chinese coast guard and navy ships doing this, its not unmarked fishing vessels or other third parties doing it on behalf of the Chinese state.
Whoever told you its just fishing vessels doing this are liars spreading misinformation. It has been official coast guard and naval vessels for years. This is very well documented.
However, you're incorrect about it just being fishing vessels and third parties. There are tons of examples of Chinese coast guard and navy ships doing this, its not unmarked fishing vessels or other third parties doing it on behalf of the Chinese state.