Yes, but when the poo hits the turbine, the undercarriage is comprised of 3 seperable systems, operated in normal conditions by 1 hyd system in flight.
For all 3 to fail is unlikely. For the lowered undercarriage (mains) to both collapse on landing is most unlikely, due to the nature of the friction washers at the bottom of the 4 mains screwjacks.
The nose U/c has 2 additional methods of emergency lowering, but has (rarely) collapsed on landing in the past.
I think you know the answer to this question........