Why is &array[0] @safer than array.ptr?

[Atila Neves via Digitalmars-d-learn]

void main() {
    foo;
}

void foo() @safe {
    int[] array;
    auto ptr = array.ptr;
}

foo.d(7): Deprecation: array.ptr cannot be used in @safe code, 
use &array[0] instead


&array[0] is incredibly ugly and feels like an unnecessary hack, 
and I'm wondering why it's @safe.

Atila