For following your reasoning to the end, you have to start reasoning. @Nakosis thinks intellect is of not much relevance to morals but if you don't think, you just have your instincts - and they will probably kill you in our modern world.
Yes, all reasoning leads to some basic values (which rest on feelings). You can't reason without some axioms. But without reason you are no more than a stimulus - reaction machine. You need both. And since you are living in a society you also need the knowledge about common values.
That's what I said in my initial post: there are three equally relevant basis for morality, not just one.
Yes, except in rare cases, I think we are basically a stimulus - reaction machine. That we are otherwise is an illusion.
I don't see how any of these 3 relevant basis escape being dictated by feelings.