Uh, no. You weren't in the service, were you? For what the .50 was designed for, there is no substitute. If you've ever seen a .50 eat a wall apart or chew a light vehicle into pieces you'd know better.
It may sound tough for today's Snowflake Brigade but in earlier days we grew big enough to carry it where it needed to go.
I certainly defer to your experience. But don't we have highly mobile high explosive systems (bloopers, RPG and more advanced types of the same weapons) which can accomplish these objectives that would be much lighter to haul around? I'm not arguing with you, I'm just asking.