Unfortunately, this would break existing code:
if(some_condition)
while(some_other_condition) {
// ...
}
else
// ...Currently, the `else` branch belongs to the `if`; with your proposal, it would belong to the `while`.
An `else` always attaches to the closest construct where it can be accepted; AFAICS, this cannot be changed without making the language grammar context-sensitive (it would require parsing `while` inside an `if` differently from other `while`s).
