The important bit in a crosswind landing is the flare-decrab-touchdown combination where there are usually issues, almost exclusively due to lack of practice of high crosswind landings (I would say a small amount of pilots lack theory). I do not really see any major benefit of handflying the approach but just an increase in workload. The SIM is definitely the place to practice all of that, and especially in the -hopefully soon- post covid, non jeopardy pure handling SIMs will be very important.