On a scale of 1 to 10 with 10 being the highest. How important do you think water temperature plays in a role of landing a fish (LMB Specific)?

My reason for this question:

63-68 degrees World-wide, this is prime spawning temperatures for largemouth bass. Redear sunfish and bluegill begin preparing and sitting on nests. Trout active and growing.

69-72 degrees "1. The largemouth seems most comfortable when the water is between 65° and 75°.
2. The bass spawn wanes, with schools of baby bass beginning to appear. Bluegill are on nests. All fish feeding well."

These temperature ranges in the San Diego CA /Riverside CA area currently occur approximately between 1300 to 1800. (I didn't factor in any times after 1900 and before 0600 because most lakes in my area want you off the lake around these times).

So why do the majority of anglers get up a 0 dark thirty to make a early morning launch?