That's not really true, or is at least unclear. The FAA allows time logged in approved simulators to be counted toward an instrument rating, for instance, up to a limit.
The US Army make use of simulators when training their helicopter pilots, as it enables their trainees to meet test standards with fewer hours spent in real aircraft. [0]
Except that not every hour is the same. Flying straight and level following a GPS track with no relevant weather or traffic anywhere near accumulates a different kind of experience than other kinds of situations (bad weather, complex airspace, other traffic, ...).
Number of landings is probably more relevant for survival.
