That is the most ridiculous graphic ever -- apparently the moon only controls the tides when aligned with the sun?
Speaking of solar tides, why is there no high tide at noon everyday?
Because noon isn't when the sun is closest to the earth, just when our part of the earth is facing directly toward it. When the moon is aligned with the sun there are higher tides; only slightly because the moon exerts much more force on the earth than the sun (being closer). When the moon is perpendicular to the sun tides are reduced, again only a little bit.
However that's not the point.
The graphic was just intended to illustrate my point: The high tide moves around the earth. It doesn't reverse direction; it doesn't stop. It also moves across Antarctica from one side to the other. This can't be explained with any flat earth model; it only works with a spheroid. The effect of the sun further complicates it. It's similar to the problem with day and night but harder to explain.