They each suit different circumstances and personalities. Some projects have such great challenges that only one style is possible. There are four cults of Quality genie, and they don't mix well. Each cult thinks it is the most important. Its members dismisses the other cults as useless, or wrong, or mere copies of greatness.
Most people have training and experience based in one or two of the cults.
When risks change into problems, the way people respond to them can result in new risks. When risks occur together they may impact on the same thing, or on different things. The different risks are often caused or influenced by the same issues. Control Some Control methods work best when others are also used. Indeed, they may depend entirely on support from other Control methods.