So this chart doesn't measure sunlight levels through the day

What do you mean by "sunlight levels"?

Depending how north or south you are is how much much total light you are going to get. Shifting an hour does not add or subtract total sunlight time.

The whole point of daylight savings time is to get the "arbitrary numbers" to line up to a daily schedule.

This chart shows you how well the three systems would achieve getting you those "arbitrary" times.

If the sun rose at 4 am and set at 1:30 pm. Sure, you could plan your whole day differently around that. Wake up at 4am instead of 7am. Go to bed at 8pm instead of 11pm. Work at 6 am instead of 9am, get off at 2pm instead of 5pm.

Yes they are "arbitrary" but humans are not computers. Having to go to bed at 8pm to wake up at 4am is different in our minds than going to bed at 11pm and getting up at 7am. Still 8 hours of sleep but it is perceived quite differently.