I've heard this often, but I'm going on ~25 years of using Linux, and I would be lost without my dotfiles. They represent years of carefully crafting my environment to suit my preferences, and without them it would be like working on someone else's machine. Not impossible, just very cumbersome.
Admittedly, I've toned down the configs of some programs, as my usage of them has evolved or diminished, but many are still highly tailored to my preferences. For example, you can't really use Emacs without a considerable amount of tweaking. I mean, you technically could, but such programs are a blank slate made to be configured (and Emacs is awful OOB...). Similarly for zsh, which is my main shell, although I keep bash more vanilla. Practically the entire command-line environment and the choices you make about which programs to use can be considered configuration. If you use NixOS or Guix, then that extends to the entire system.
If you're willing to allow someone else to tell you how you should use your computer, then you might as well use macOS or Windows. :)