Yes, genius, I have another stupid argument for you. 6 times they found nothing interesting? But they kept going back to the lunar equator? Now that's stupid. Why didn't they go to the north pole? They would have found tons of water and people would have been thrilled to death. But, no... all they did was bring back moon rocks, and more moon rocks. They might have found some kind of life in that water. But noooo... lets go to the equator again, and, duhhhh... we'll bring back some more moon rocks.
First, saying “they found nothing interesting” is an incredibly ignorant statement. Saying that to a lunar geologist is like telling a marine biologist that there’s nothing of interest in the Oceans. The statement is so ignorant, in fact, that I have to believe you’re just trolling.
Second, the lunar poles didn’t hold the interest in 1969 that they do today. The idea that large amounts of water could be found in the permanently shadowed craters near poles didn’t develop until the 1990s.
Third, an engineer would recognize that not all parts of the Moon are equal in regard to what it takes to reach them. Some parts of the Moon require more delta-v to reach than other parts. Consequently, some parts of the Moon were out of reach of Apollo.
Furthermore, all the Apollo mission where initially launched on free return trajectories. A free return trajectory greatly limits the areas of the Moon that can be reached to those in the equatorial zone. Starting with Apollo 12 the missions began to use hybrid trajectories, which started out as free return trajectories but deviated from this after a mid-course correction. This expanded the area of available landing sites but, since they stated out on as a free return, they were still limited to a low inclination band relatively close to the lunar equator. This was a trade-off for having the safety factor of an initial free return. However, with only five landings made, there were plenty of interesting and diverse sites available in the near side equatorial region that there was no need to consider high latitude landing sites.
Finally, consider that as the LM is on the surface of the Moon, the Moon is rotating. This causes the landing site to move in relation to the orbital plane of the CSM. Before the LM can launch and perform a rendezvous, the CSM must perform a plane change to bring the landing site back into the plane of the orbit. If the CSM is in a low inclination orbit with the landing site near the equator, the movement of the landing site is mostly within the plane of the orbit, with only a small amount of movement outside (perpendicular to) the plane of the orbit. This means that the CSM has to make only a small plane change. On the other hand, if the CSM is in a high inclination orbit with the landing site near a pole, as the Moon rotates the landing site moves mostly out of the plane of the orbit. This means that after several days on the Moon, the CSM must perform a very large plane change to bring the landing site back into the orbital plane. Anyone familiar with orbital mechanics knows that large plane changes are very costly in terms of delta-v, hence propellant. The Apollo CSM simply didn’t have the capacity to perform such a maneuver.
In summary, Apollo was limited by the amount of propellant it could carry to landing sites in the equatorial region.