Yep... the anti-vaxxers are using his death to push complete nonsense... Colin Powell's death sparks misleading claims about Covid-19 vaccines https://www.bangkokpost.com/world/2200967 The reality... What Colin Powell’s death tells us — and doesn’t — about COVID-19 and vaccines https://www.latimes.com/california/story/2021-10-19/colin-powell-death-covid-vaccines
This "However" is a very critical word here. Just because the program seemed to have not existed doesn't mean that the threat does not exist anymore. As stated above "small-scale covert laboratories were maintained until 2003". Even lethal human experiments were conducted after the Gulf War. And these wouldn't have been discovered if not for the Iraq War. The merit of the Iraq War can be debated until whenever but the bottom line is Powell did not lie according to what you posted here. That's the bottom line.
Because he would have likely lived for years with treated myelenoma, it's a contributing factor but the primary reason he died that day was Covid. One day you will accidentally shoot yourself or be shot dead very likely. Should "profound lifelong mall-ninja stupidity" or "gunshot wound" be the noted COD? OK, should is obviously the pre-existing mall ninja. However the coroner won't write that.
This is the case with most Covid deaths. The media will have you believe that all these Covid deaths were in completely healthy people. It is simply not the case.