I have used Kotlin professionally for a couple-few years; and, in my experience, infix operations are a choice and you don't have to use them. - in fact, I don't think any bit of code in anything I've used uses infix operations, this is my first time seeing them in Kotlin in the wild.

For example, I haven't used them even once.

That said, I, personally, have done almost no Android programming in Kotlin, so perhaps I'm missing the main environment where such things are done? For me, Kotlin has mostly been an aggressive amount of syntactic sugar to make Java a nice experience?

And most of the DSL-style code that I write uses function pointers as the last parameter, so I can do doTheThing(parameters) { anonymous function } and that's about it?

I'm sorry that the organization you work with has aggressive bikeshedding. Perhaps this is something your organization, in general, could have a conversation about?