Not really, there is a tight tolerance on the bore diameter so the press fit in the bearings will be able to hold them in...
we machined the cam bearing bores after we installed them at the engine factory so we could hold the proper tolerance and fit of the cam journals... There was a diameter and surface finish spec... Have you ever tried to get a surface finish reading on a cam bearing... Very difficult to get in there and get a reading, especially on the middle ones....