Which is actually the smart way to go about things. Riding extremely conservatively like he has done in the last two years, except the downhill attack and crosswind attack last year, of course, has seemed to reduce the amount of doping accusations compared to 2012-2015. Sky as a team are neutralizing the race all the way to the end, rather than pulling Froome to the last mountain and unleashing him. Since he knows he will crush everyone close to him in he GC in the TTs he just has to sit on the wheel of whoever is putting pressure on him in the mountains. There's been plenty of occasion in the last couple of TdFs where it looked like Froome had far more gas in the tank, but chose to ride conservatively.
When he had a flat after AG2R had started putting the hammer down he managed to drag back a 40 second deficit on less than one cat. 1 climb, despite AG2R riding at a consistently high pace. He also had enough in him to respond to an attack after he'd regrouped. On Izoard he rode away from Bardet and Uran with ease and created a huge gap in a matter of seconds, but looked to ease off as soon as he'd gotten onto the back of Landa. Last year he consistently followed the attacks of the other favorites and never actually dropped time to his rvals in the mountains, except for a few seconds lost to Bardet at the very end when the race was already wrapped up. Up until stage 19 he was the only rider in the top 10 who had not lost time to any of the other top 10s in the mountains, somewhat helped by the officials on the Ventoux stage, obviously. He's still the best climber and time trialist of the GC contenders by a mile when he shows up in France. He's just way better at hiding it, and he doesn't clean up other stage races during the season. Instead he grabs his Tour win and calls it a day, Lance style. Now, if he grabs the Vuelta this year there's going to be fireworks coming against him from his doubters, so I hope he's dumb enough to do it.
Staying out of the media, both during the TdF and otherwise, also reduces the negative attention towards him, because even when he does physiological testing to prove how squeaky clean he is the only thing he accomplishes is more doping accusations, because the part of the audience that saw his 2011 transformation and knows what something like that means in the sport of cycling will never believe him anyway. Especially when his attempts to prove his cleanliness are half-arsed at best. It's been almost six years since he went E.T. Mode and Sky have released almost no power files, blood values or anything else that stands up to scientific scrutiny and is of any value to anyone trying to prove Froome is clean.
My guess is that any relevant data would probably prove the exact opposite, so they can't release it. In that case it's better to just shut up and generate as little media attention as possible rather than stringing people along in the limelight until they start criticizing again.
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