Wiseblood
Adventurer
But, if you have a smaller range of numbers, there has to be a maximum ceiling that is smaller than with a larger range of numbers. That's pretty much obvious.
So, if you only have a range of 1 to 5 (to pick a range) then you can only have 5 possilble target numbers. If you have a range of 1 to infinite, you can have infinite target numbers.
The presumption here is that all encounters, whether combat or not, will always be exactly the right level for the party. That's simply not true. Once you reach a particular level, you need a range of options from about -5 to +5 of that level. You could go further, but, it's not really necessary.
Unless you start having one level be exactly the same, bonus number wise, as the last level, you have to spread out the numbers. So long as you have levels, and you want to have each level actually be different from the level before it, you have to increase the numbers.
If you force the game into a particular band of numbers, then you have to "squash" the levels in between those numbers.
Having an infinite range is an illusion when in reality it is only an excerpt of numbers relevant to a given level. These numbers still coorelate to a span of numbers found on a d20.