Earlier quoted context omitted.
Could it be that you have more knowledge of Swift and don't care/want to invest in understanding Node.js/JavaScript? I really enjoy writing backend code in TypeScript for Node.js. But loath having to write Swift code for iOS. I know a big part is my unwillingness to invest time in Apple's ecosystem and properly learn Swift.
I used to work with web technologies but I got overwhelmed with the complexity of the tooling. For example, TypeScript is nice but it's not a "real" language in a sense that you can write something in it and expect it to work when it's fed into the compiler or interpreter. To use it, you need to set up an environment where all the moving parts are working in harmony and the code you write in Typescript is transcribed…
But I agree, Swift is a pleasure to work with.