Of course, you don’t just walk up to someone else and say “Raining.”
You say “It is raining.” Except, what is the ‘it’, exactly?
‘It’s’ not the sky, nor the clouds.
The problem with language is that words always fall short of truly describing any meaningful event or thing, or, put another way, anything that is beyond words.
No doctor or scientist can tell you how your body works; it just works.
Just remember not to identify too strongly with the meaning (or real meaning) behind any particular set of words.
Words & language are great, but they don’t cover everything, because they’re inherently missing something fundamental.