@helianthropy because 'all lives matter' usually isn't said just as that but usually said in the context of erasing racial discrimination and white-washing black lives matter .. rather than merely stating that all peoples matter; like the statement itself would be generally true and like fine by itself; but its never said by itself.,,

.. it doesn't actually _mean_ what it says

though admittedly, some* have attempted to reclaim it .. but to mixed results