TambourineMan nah, that's just your vendetta.
Havertz's isn't stopping us from signing a game changer - as evident by our activity this summer nor is Arteta looking to sell him. Arteta loves the guy. When Arteta wants to move someone on, he freezes them out. Having Havertz and Gyokeres is actually a fantastic outcome.
Also, for the record, Havertz wasn't a squad player at Chelsea - he started 30 out of the 36 games he was available for in his final season.