For some people solving business problems is boring. But tinkering with those things that you're calling trivial is what brings joy.

You and me both.

Is that true tho? I mean, I love programming, but I hate React. I love thinking about data structures and their relationships, but I don't like Docker. I spent hours thinking about how can I solve a problem (just for fun) and I absolutely don't need GCP nor Azure. I like coming up with cool algorithms (or reading about them) but I find Laravel (or Django) really unelegant and not worth my time.

It depends on the problem you're solving of course. All of these tools are built to be able to solve larger, more complex problems more effectively. You are still welcome to ignore all of them and write a cool program for yourself for fun, just don't expect to get paid for it.

Ultimately, we get paid to solve business problems, not to have fun with programming.

This is of course true. But is a particular fashionable technology the best way to solve that business problem, or is yet another layer of fun? I suspect that being able to deliver simple scalable solutions without bandwagon dependencies is going to be a differentiator, in _business terms_