You absolutely don't have to believe, I don't. However you cannot say, you can only allude to it because there are legal repercussions. Obviously, on a random thread off an old running board it's unlikely to happen so it's best to talk about the ones that have been caught.
It's up to you to decide if it's a giant conspiracy or if there's something going on.
Of the 11 men in history to run 9.80 or faster, all but Usain Bolt have been banned or linked to an anti-doping infraction.
9.58 Usain Bolt
9.69 Tyson Gay — banned for one year for steroids in 2013
9.69 Yohan Blake — banned for three months for stimulant in 2009
9.72 Asafa Powell — banned for six months for stimulant in 2013
9.74 Justin Gatlin — banned for amphetamines in 2001 (one year), testosterone in 2006 (four years)
9.78 Nesta Carter — failed test for stimulant at 2008 Olympics, banned for three months
9.78 Tim Montgomery — banned for two years in 2005 for involvement in BALCO scandal; later admitted to taking testosterone and HGH
9.79 Christian Coleman — facing potential 1-2 year ban for 3 whereabouts failure in 2019
9.79 Maurice Greene — allegedly paid for steroids in 2003 and 2004 (Greene denied the allegations)
9.79 Ben Johnson – banned for two years after testing positive for Stanozolol at 1988 Olympics (Johnson’s time was invalidated).
9.80 Steve Mullings — banned for testosterone in 200 (two years), banned for life for masking agent in 2011