retorque heads to solve issue?

Just my take on this re torque issue. What I think really happens when one re torques is, the process of loosening then re tightening the head bolt results in the threads and under bolt head area becoming burnished and a better fit together. That means that more of the torque put into the bolt goes into clamp load and less is lost to thread and under head friction. I say that as I really doubt that the gasket itself moves and somehow better positions it self. Think about it, all of the other head bolts are still tight on a static non running engine. How is the gasket going to move. I think it is better clamp load due to an improvement in thread and under head bolt fit.
I will go a step more and say that if you need to re torque head bolts you should look closely at how you are prepping the head bolts and block threads prior to assembly as well as evaluate the kind and quantity of thread lube being used as well as the accuracy and repeatability of your torque wrenches. Re torquing may be fixing an issue, but that issue did not need to occur and could have been prevented with better assembly practices.