On the morning of the explosion there were reports the frame attaching the shuttle to the fuel tank was cracked. Watch video of the explosion and you will see the fire start at that joint, not the booster. It can clearly be seen in the Ronald Reagan video on the disaster.
AND watch multiple videos of the explosion aftermath, there is NO evidence of an O-ring burn through, both boosters are flying approximately the same. There are videos online which show the erratic flight of a rocket with a leak. Morton-Thiokal took one for the team so NASA didn’t shoulder the blame.
Remember the C5A? The plane. Same size as a 747 which could have been converted. The 747 idea was treated like Hydroxychloroquine and big pharma got in the way. Same thing. Whistleblower ended up managing bowling alleys at AF bases in Thailand.