That kinda harks back to that Edwards article posted on here - players who dribble can be a liability as much as they are an asset. Attempting a dribble, instead of playing a safe pass, could indicate a risk. It all depends on the manager's system.
Without seeing the 'failed dribbles', it's impossible to read in to it. I think a lot of people do that on purpose though, to try and misuse stats.
Yeah Trippier's fail rate is fairly low because he doesn't try many (0.2p90) but, personally, I take that as a negative too.