The original post splits nuance down the middle.
If others, like your family don’t beleive in, it doesn’t matter.
Success isn’t contingent upon other’s belief in you.
And yet simply saying you don’t need anything but belief in yourself is solipsism.
Perhaps “belief” is the trouble word, cause it’s just a passive state.
“Just do things” gets at the heart of it.
Maybe some beliefs are more helpful than others, and support can be helpful, but at the end of the day ‘it don’t make a fuck.’
Just go crush.