Because if you do, the safety net will collapse your circus tent by their sheer weight. The actual argument has been made in sibling comments: braces are verbo

Because if you do, the safety net will collapse your circus tent by their sheer weight. The actual argument has been made in sibling comments: braces are verbose, and the mistake we speak of is exceedingly rare in practice. For simple one-liners, the verbosity costs more than the lack of safety net.