I would not ignore braking reports by other pilots flying the same model aircraft I am flying. I would use those reports in combination with other sources to attempt to put together a complete picture of braking action on the landing runway. Official reports can be old or, in rapidly changing conditions, invalid. A PIREP from an aircraft which landed immediately in front of me would carrry more weight than a 30 minute old RWYCC. Turbulence reports are also subjective, we don’t ignore those but also put them in the mix in an attempt to create a complete picture.