You must be retired.No its not. Timing/tight welding a bolt handle, truing the bolt face to the receiver, timing the trigger, reaming and bushing the FP raceway, amongst other things takes longer than chasing threads and truing up the face and abutments on a receiver.
Plus the recoil lug almost always needs to be replaced because if you use the factory lug, it makes the truing job on the receiver face all for nothing.
Remington needs to know that they are putting out actions that have a lot wrong with them. Shouldn't have to do that much work to them. Most other factory actions dont have the issues Remington does.