This is bad design. Why excuse bad design? When I send a text message and it doesn't arrive, my messaging app lets me know. With Signal, this is a step backward.
has_my_thing(some_array) can be encapsulated too, using modules. For example, in elixir you have functions like List.to_string(some_list) and Map.values(some_map). This way, you get encapsulation and don't have to have a class.
Going forward, the pipe operator is going to be showing up in many new languages. I've used elixir a lot, and the pipe operator is a genius piece of syntactic sugar.