After a decade of working as a developer, I was introduced to Agile ways of working. They made such sense that over time I became a Scrum Master.
That led to becoming an Agile Coach, and getting certified up the wazoo. Much deep work and I became an Enterprise Agile Coach, and let the certifications lapse as I'd lost faith in them.
Now I spend my time helping people understand how work works - the deep underlying thinking that led to Agile. It only led there because the nature of work had changed. There are plenty of other ways of working, that situationally are highly effective too - if you know you're in that situation! I aim to help people a) figure out their situation, then b) figure out the best way to work in it.