There is a huge difference between the two sentences but most of the time we mingle and confuse them.
Not speaking up as I don’t dare may be ok initially. But sometimes u do need to speak up and till then don’t dare becomes u don’t care.
A lot of things in life get converted from I don’t dare to I don’t care and once set we really don’t care.
I don’t dare to learn public speaking as its scary to speak in front of the audience becomes I don’t care with time. And then we never care to try again.
But if we can keep the distinction alive and keep it to I don’t dare, someday we will dare to overcome it.