Arkroyal
I completely agree with you what more can ATC do.
MOR If you are flying an ILS and a C172 hits you again ATC cannot physically fly the plane. They can give traffic information even avoiding action, if it is noticed, but we usually have more than one plane to watch at a time. Any ATCO if they spotted a possible nasty would of course yell, but SMRs are not great at spotting how tight a gap is. Get real...