Item level requirements when crafting

I don't understand the concept of finding a rare that Is an upgrade and then thinking hmmm I'm gonna pop an exalted on it and then it gets a stats that changes the item lvl requirement to 5 lvl higher than me.

That makes me not use crafting item isn't that counterproductive ?

What matter is ilvl, when you pop your exalt the selected mod will be within the range allowed by the ilvl if it roll onto an affix with an higher level requirement than what it had prior it make sens that it upgrade the level of said item. Now you could put the requirement to the maximum possible from the get go but it would reduce player agencies so i'm personally not for it.