Why does the axial precession have little effect on the seasons?

Answer 1

The main reason is that the period of the axial precession is in the neighborhood of
26,000 years, or roughly around 0.014 degree per year. Even if it had a great effect
on anything, the change wouldn't be noticeable within a human lifetime at that rate.

But no matter what stage of the precession the Earth is in, the axis is till tilted roughly
23.5 degrees from "straight up and down", and THAT's the entire cause of the seasons
and their behavior.

Answer 2

Axial precession is the slow change in the orientation of Earth's axis over time. While it does affect the position of Earth's axis in relation to the stars, it has little impact on the changing seasons because the tilt of Earth's axis (approximately 23.5 degrees) is the primary factor responsible for the seasons. The tilt causes different parts of the Earth to be more or less exposed to sunlight, creating the seasonal variations.

Answer 3

Axial precession doesn't change the angle of inclination of Earth's axis (though there are other effects that may change it over time).