I think you can have as many tools as your situation dictates....
My normal set is:
1 tweezers for charcoal
2 tweezers for food, 1 for raw, 1 for cooked / cooking ( sometimes two for cooked )
One big very wide spatula
these are at general center of however many kettles I'm running....
Cutting boards, 2 or 3 depending on qty. of food
2 or 3 different types of knives, I don't use expensive, cause I wail on stuff, fast & furious, sometimes
Also have a canvas satchel w/ grate hooks, meat hooks, therms, lighters, misc. whatnot
~~> This sits in a box along with a simple saucepot, some basic seasoning & some small slats of wood for levelling kettles....
This is 'cause at least half the time I'm goin' mobile for at least a portion of the cooking
It really depends on if you move around quickly & carry your tools as you cook or are more even, metered & maybe leisurely....
Short answer: a lot of spatulas may just be a matter of style....