Have you ever seen a cut away diagram of the earth's magnetic fields? Surely you've seen the iron filings depicting the magnetic field of a bar magnet? It is a magnetic field; it is thick, it doesn't have holes. I'm not sure we can't shoot a hole in it, these days, using that big ELF wave gun up in Gakena, Alaska... but that was built in 1992. What they are saying is pure nonsense, there is no way to skirt the edge of the field, unless you release from earth orbit at the poles - but Apollo flight paths were inside the tropics, so if you want to go to the moon, you have to traverse the earth's magnetic field, it is that simple.
They downplayed all the radiation for the entire trip. But let's use their numbers; okay? 5 REM for crossing the Van Allen belts as if they hardly existed.... one REM for 24 hours of spaceflight in the solar wind as if it was barely there... 3 REM for solar flare events as if they were practically innocuous... 2 REM for 24 hours on the moon as if it was barely a concern... add up the numbers for Apollo 17 and you still hit 50 REM. One REM doesn't even get you through their numbers... it doesn't even get you out of low earth orbit by their numbers. Their whole argument is subterfuge; they recognize that the dosimeters clearly prove the missions never left low earth orbit but they go on to argue down the numbers as if they were thereby proving it was possible... the idea being, to get you lost in their argument so that you never stop to realize that it is just a bunch of lying to cover up the facts.