I worked with a few different types of Flash guys. The top guys were artists, they delivered awesome stuff that nobody has seen since. (But, like the website, it was hardcoded to desktop dimensions.) They made a great living doing this stuff. Some of them jumped to HTML5, but that whole 'flash splash' thing largely went out-of-style.

There was also more of the run of the mill 'hero animation', jquery was good enough for that. I think they still use Adobe Animate for banner ads.

And then there was the junior guy who was good at flash and just wanted the entire web to be flash, and that was more of the debate because some assistant creative director thought it was slick.

(And lest I forget, there were also the ActionScript guys who spent all day in their IDE writing MVC code, and rarely using the Flash editor.)