On the contrary, my side projects tend to have the most strictest linter, test and CI suites. Why? You may ask.
I'll tell you. I forget stuff.
So when I pick up that Openweather tool after three years of not touching it to quickly change the output a bit, I can be pretty sure the overly robust scaffolding around the project won't let me break anything.
That's the beauty of side projects, you get to decide and you don't have to care about working with others.
Really yearning for crafted code that meets every one of your perfect coding style guide and preference with green checks across a huge set of static analysis tools and a large test suite, go for it!
Tired of conforming to your ultra strict style guide at work and code reviews that go in endless circles nit picking about use of spacing or whatever? Let loose and stop having to care/worry so much about the details.