I mean, kind of. You don't really need much controller logic most of the time anymore. Last Rails backend I wrote probably involved personally writing a few lines of code here and there. Generally, I'm just pushing a JSON object back and forth. Auth and emails can just be 3rd party. The vast majority of controller type behavior ends up client side at this point. Partly, because its way simpler to scale with you push as much processing to the client as you can. Also, look at something like Firebase or Hoodie as examples of simple stores that require no backend logic.

Its not that Rails and Symfony are useless, I use them all the time, its just that they are kind of dated concepts. Heck even Wordpress solves a specific problem on the backend enough to be useful sometimes. That said Drupal at this point is such a dated concept(superseded by things like Rails and Symfony many years ago) that is should no longer be used.