I agree you won't (generally) go wrong inflating to the max cold pressure. The vast majority of failures are due to tire heating because of the excessive flexing of an underinflated tire. Once the carcass exceeds a certain temperature, its only a matter of time. However, you won't get the full life of the tire that way.
A tire is molded with a flat face (in cross section) where the tread is. With no pressure, everybody's seen that the center of the tread collapses inward. As pressure is added, the center will rise until it is starting to arch outward. Now when you put the tire on the vehicle on the road, the weight on the tire will flatten that arch out.
Too much pressure for the load and the 'contact patch' will not flatten out enough, there will be too much load on the center and too little on the shoulders and the result will be too much center wear and reduced life.
Conversely, too little pressure will mean that the center isn't being pushed down enough to flatten out the contact patch, the shoulders will bear more weight relative to the center and you will get premature edge wear (and there will be too much flex and the self-heating of the compound due to that may cause a failure).
At the right pressure for the load (what those inflation charts tell you - Goodyear's is here
) the contact patch flattens optimally.
So its a Goldilocks thing but it requires you know the load (weight), the section numbers of your tire and have an inflation chart.
Personally, I don't always know my weight (can also change quite a bit depending on whether I'm alone or not, carrying water or not) so I inflate for (max GVWR - pin weight at max gvwr) / 4. This is especially important for folks like myself who went up a load range in the same size. If you went up a load range and inflate to max for that range, the tires will be like rocks and your camper will not be having a good ride.
But if you have the same load range as originally supplied (on the tire placard) you will be safer at max cold pressure than by getting it wrong on the low side.