The thing is, having some structure in terms of types or data shape constraints helps you model and understand your program. You can change them as your understand of your program changes or the need arises. You can be against static types because they force you to slow down and think about things before you can just get to coding, and it can be sometimes annoying to model your system using them (and sometimes not so useful), or other technical reasons like some type systems don’t allow you to model certain things, but to say it just leads to devs putting the real world into stupid, arbitrary categories when the real world (and your program!) primarily have data that can be trivially categorized because that’s what Rich Hickey said makes you sound like cargo-culting or parroting a point without diving deeper into the specific reasons and potential counterarguments.