You do realize these Annual State of Agile Surveys are self-selected and not an actual statistical sampling of people. Thus, the answers come from people who choose to answer the survey. People who do not like Agile or have had a negative experience with it, likely do not take the time to respond. So the survey skews in favor of positive reactions.

Also, since this is an Agile experience survey, should we be surprised that "95% of respondents reported their organisations practice Agile development"?

You write "the coupling of Agile and Scrum seems to have taken over the industry" as if to suggest they are different things being combined in some way. Agile is the umbrella under which Scrum, XP, DSDM, LeSS, etc. more or less fit. And the practices you list, while in Scrum, are in other approaches, like XP.

It is interesting that you say Agile and Scrum "have taken over" and then note only 58% or respondents indicate they are using Scrum. However, the survey data shows in the report I see shows 87%. Of course the list of other approaches, including Scrum mixed with other things, totals way over 100%, suggesting that respondents are using multiple approaches, not just one. (I would agree that Scrum and variants on Scrum are most widely practiced, though most technical practices listed as being used are not mentioned in Scrum and historically come from XP.)