This is not necessarily true. First, I cannot believe that a PSA is not going to perform up to the same standard as a Tikka T3, but let's assume that it does. Driving a gas gun for precision is not as easy as driving a bolt gun for precision. You have to have consistent cheek weld, trigger control, and loading (whether on a bipod or a barricade) on the rifle from shot to shot. The purpose to have to maintain those fundamentals is due to the lock time on the gas gun being much longer than on the bolt. Additionally, you have to maintain those same fundamentals due to the dwell time that occurs with gas guns. On a bolt gun, this is not the case, the lock time is much faster and dwell time is non-existent which allows the bolt to be much more forgiving in that regard.
Think about this: you can lock a bolt gun into an ARCA clamp, get on target (assuming all data is correct), send a round and impact that target without even looking through the scope. If I remember correctly, Lowlight has performed this shot several times. Now, replace that bolt gun with a gas gun. Does that impact still happen? It might at shorter distances, but I don't think it does at further distances. That's actually something that needs to be tried now that I'm typing about it!