Agile made Management, who had actual Senior Designer-Developers and Technical Architects designing and adjusting actual development processes, think that they had this silver bullet software development recipe that worked for everything so they didn't need those more senior (read more expensive and unwilling to accpet the same level of exploitation as the more junior types) people anymore.

It also drove the part of the Tech Industry that relies mainly on young and inexperienced techies and management (*cough* Startups *cough*) to think they didn't need experienced techies.

As usual it turned out that "there are no silver bullets", things are more complex, Agile doesn't work well for everything and various individual practices of it only make sense in some cases (and in some are even required for the rest to work properly) whilst in others are massive wasting of time (and in some cases, the usefull-wasteful balance depends on frequency and timing), plus in some situations (outsourced development) they're extremelly hard or even impossible to pull at a project scope.

That said, I bet that what you think is "The Industry" is mainly Tech companies in the US rather than were most software development occurs: large non-Tech companies with with a high dependency of software for competitive advantage - such as Banks - and hence more than enough specific software requirements to hire vast software development departments to in-house develop custom solutions for their specific needs.

Big companies whose success depends on their core business-side employees doing their work properly care a lot more about software not breaking or even delaying their business processes (and hence hire QA to figure out those problems in new software before it even gets to the business users) than Tech companies providing software to non-paying retail users who aren't even their customers (the customers are the advertisers they sell access to the eyeballs of those users) and hence will shovel just about anything out and hopefully sort out the bugs and lousy UX/UI design through A/B testing and user bug-reports.