Many fatal risks overlap, like working at height near energized equipment or a confined space that is also a hot work area, and a system that flags each one separately on every step quickly produces so many warnings that people start ignoring them. Too many warnings can end up almost as harmful as none, because the important ones get lost in the noise.
The way to reduce that noise is to define how related risks combine, flag the step once with the full combination and only repeat a warning when something actually changes. Reviewing the flags with the people who use the procedures also helps, since they can quickly tell you which warnings are useful and which are just clutter.