NWRA, as I remember the Bradford Disaster was caused by a lit cigarette falling onto rubbish which had accumulated over the course of the season under the stands. This started the initial fire which quickly spread throughout sections of the wooden stand.
Therefore, unlike Hillsborough (where it may or may not be true) there’s no external factor, outside of the club to concentrate or focus possible blame upon. Perhaps this maybe reason the people/supporters of Bradford prefer (not to forget but rather) to remember in a different manner.
Again if I remember correctly on the day of the Bradford Disaster two more football supporters were killed when a wall fell on them at a Birmingham v Leeds game. Such events seem also unimaginable today – lest we forget.