?
Because the charts DO track spell levels, its right there in the character creation when you select your class.
The problem is Larian isnt communicating that information. Its (again) not the fault of 5e, but Larian.
What I am saying is, to a complete newbie to tabletop or D&D, I can see how spell levels can be confusing. It is somewhat unintuitive.
Why is fireball a level 3 spell when it can only be cast at level 5 and up? Because that’s how it’s always been. Always been doesn’t make it right.
But this is more of a D&D issue that cannot be resolved with 5e. So for a designer who may not be too familiar with spell levels, it’s kinda strange and equally strange to those who have no experience with D&D at all.