Exactly the point. Vls=Vref=Vapp.
+ 1/3 of the reported head wind for the reduction in of its speed in the boundnary layer below the anemometer height
or + 5 kts if A/THR used (to allow for its speed drops not expected to exceed -5 kts)
So, if the displayed Vfms is Vls+3, without really knowing which is correct, why add 2 kts? Worst case it is still Vref+3.
@CheckAMN: all good until you start to develop a "long landing standard" technique. Then one day going into a short-ish place people opt for a "short landing technique" (which should have not need to exist in the first place!!!). And it scary to watch them fail their first attempt at executing what they did not practice before, and actually, they have no idea or guidance what it should be like.
But as long as the shortest LDA is 2500 m, the discussion is admittedly academic. Unless one's ready to see the broader views presented by safetypee above. Similar to going for 3 red's on the PAPIs, boss.