Shouldn't for loops return values the same way blocks do?

So we can do

{ 50 + 10} + 7

but why can't we do the same thing with for loops?

for i in 0..10 {

  if i == LUCKY_NUMBER {
    break i; // assuming this is how it would return
  }  

} + 60

The intent is not to overcome any problem i'm facing or anything, just a discussion. But this is what sparked the question:

I was trying to find the index of some element, so i used the for loop to analyse the elements 'til some condition was met, which would mutate a variable outside the for loop.

// My solution. Not the best example and i didn't do this exactly of course.

let mut magic_index: usize = 0;

for (index, element) in array.iter().enumerate() {

  if SOME_CONDITION {
    magic_index = index;
  }  

}

Here's how this could look like, although it's completely incorrect:

let mut magic_index: usize = for (index, element) in array.iter().enumerate() {

  if SOME_CONDITION {
    break index;
  }  

};