Buddhism would not exist without the Suttas. You should read them, and make it your goal to understand. This is the basic starting point. Claiming to be a Buddhist without a basic knowledge of the fundamental teachings is just a fantasy. Don't indulge in fantasy. It will get you nowhere.
I don't recall the Suttas being mentioned in the refuge ? Why do you think, that Dhamma would only exist, if there is Suttas ?
Buddham saranam gacchami
I go for refuge to the Buddha;
Dhammam saranam gacchami
I go for refuge to the Dhamma;
Sangham saranam gacchami
I go for refuge to the Sangha.
Dhamma is not a book, Dhamma is not a collection of Suttas...
I see the Sutta Pitaka, as a (one possible) guide to finding/understanding the Dhamma. I'm sure there is many other routes/guides to finding the goal, even non-Buddhist. The only difference is the route and the means to get there.
And when all that is said/written, Buddhism/Buddhist is just words.
I notice that you are very persistent on the topic, of categorising the Suttas as some flavour of sacred. Why is it that important to you ? Is it important ?
Personally I am convinced, that the Dhamma would be there, even without the Suttas.