I like CRA, it's my default go-to because i want to avoid maintaining a webpack configuration. If you have a solution that works for you, that's good too!
The build process of a modern React application has a certain amount of necessary complexity. Hiding it behind a "low-effort" build tool like CRA doesn't change the above and, frankly, is really a disservice to anyone who wants to understand the tools they are working with.
Go ahead, eject a CRA sometime. See how "low-effort" it really is...
I decided to try my hand at using CRA for the first (and last) time to build a small app at work because it had recently hit the scene, and appeared to be fast-becoming the idiomatic way of engaging with the library and ecosystem. I don't even remember why at this point anymore, but I had some issue that required me (as in the docs at the time said so) to eject the app. My jaw literally dropped after I saw what the project had become. It was... thousands of LoC. And spread across so many files!
Clearly we have different definitions of "too hard", but, to me, the task of understanding all of that was "too hard". I am simply not wired in a way such that I can use a tool without understanding how it works (obviously within reason). I have to imagine that when you say you "didn't want to maintain a webpack configuration" that you mustn't really understand what that entails, and are using the output from an ejected CRA as a proxy for what that configuration must look like. I assure you, it's rather simple. I've spent 20 minutes in the last 3 years doing so.
[0] I would estimate the kinds of apps that I build are far more complex than the vast majority of use-cases (think fantasy sports draft/league management software).
Now I have a package/webpack/tsconfig files that I just re-use (and update as needed) between projects. I've never encountered a problem I couldn't solve. Sure now I need to manage the configuration of each project, but, I kid you not, my webpack.config.js file is 100 LoC total. This includes everything most projects probably need: Dev server setup and proxying, JS minification, JS bundling/code splitting, and SCSS/CSS transformation and purging.
I'm sure other projects have other needs, but it's really not that hard to understand these technologies.
And don't give me this "But all of that code is there to help you!" lecture. I've been deploying reasonably complex React apps since its inception, and have yet to encounter the kinds of edge cases to which the above sentiment is likely referring. Hey, maybe I'm just lucky...