Of course you can. In fact I'm doing just that in two places in the example.
(Yes I know what you mean, but yes you know what I mean!)
In the end, chains are about readability and logical flow; even if you don't like pre-wrapping in more meaningfully named functionals like the example, and accept the slight readability cost of using the occasional in-spot lambda or partial, I feel that this still becomes a lot more readable than "treat this symbol unconventionally in this context as a positional placeholder" hacky syntax stuff.