To add to the deficulties of simulating crosswind landings, consider ground effect. At best (still wind), good quality in-flight data is difficult to obtain; it would be interesting to know what data (or assumptions) is used in simulating ground effect with the effects of drift or turbulence.
A further thought, in real conditions most pilots’ experience of crosswinds is gained by extending their previous limit, this differs from most other operations where conditions are often repeated and, perhaps excepting turbulence, are similar. For crosswinds, some conditions can be a significant extension of previous landing experience (#1), thus with additional demands in turbulence, perhaps there is some apprehension (the unknown) driving the need for quality simulation.