Be aware that the wind information by tower is also not always accurate, especially in more southern countries...
A good commander will take-in all possible weather/wind info, add it to the reported runway condition and length and decide accordingly to land or to fly-away from it.
That said, this is always easier said than done, and to the Pprune-inquisition: go play somewhere else with your flightsim. Professional flight-crew know to hold their judgement untill all facts are known. Basic airmanship it's called.