I agree [t b f l s 55] is rather messed up, but the usual use case is something like
[t b b f b] or [[t b l] or [t a b] or [t b s b] - you get it, mixing message types with bangs. I know I do this all the time and perhaps you do that too.
Just because you can do crazy and unreasonable things, it doesn't mean the object was designed for that.
And now we have a request to also include constant values, which can add even more arbitrary and unreasonable possibilities, like in your example with t b f l s 55]...
I think there's an use case to initialize a patch and not need to have [t b b b] and then connect the bang outputs to symbols and floats. So I can see how it can be convenient.