I don't remember Sky being holier than thou, the context of them saying they were going to win clean was because pretty much every GT winner didn't win it clean and all have evidence they didn't. Then the cycling world imploded with Armstrong's fall from grace while Sky were launching within that public disgrace of pro cycling and riders like Armstrong, Contador, Valverde, Rasmussen, Ullrich, Mayo etc ultimately losing cycling all credibility anything witnessed in the past decade wasn't because of cheating.
We can debate if a TUE from Bolton NHS ENT department was ethically winning clean or not for Wiggins, but on paper, every Tour won has no doping violation associated to it since Sky launched and there's been no allegation of a doping violation with any shred of evidence in any other team since either, and so in terms of WADA and 'clean' they were not holier than thou because they did exactly what they claimed they would. 14 years later their success is already longer than Armstrong's and every team now copies their marginal gains approach even though rival teams, riders and manager laughed out loud at the start lines when Sky turned up warming up, warming down, wearing speed suits to a road race, having staff dotted along the course every 25km for nutrition, weighing food etc etc, Now every team copied them and teams like Jumbo openly admit, they studied everything Sky did, copied it and focused on improving the marginal gains model. That in most walks of life is usually held up not as being holier than thou.