That rules out hundreds of thousands of Confederate soldiers who volunteered in 1861 who did not happen to be in your family line.
The Confederate officer in question organized a company of volunteers in the summer of 1861, led them in action under Jackson and Lee, and lost an arm fighting outside Richmond in the summer of 1864. Most of the men he led (two different Alabama regiments) were poor and never owned a slave. He answered many of the same points you raised in answer to a question by a Northern officer. The Union veteran could not understand why poor Southerners would fight so hard for so long with nothing to gain, as far as he could understand.
Since the officer in question was born in the 1830s, he does not qualify as a 20th century revisionist. That must be evident to you. Why bring that up?
I get the feeling that a thousand quotes by a thousand different Confederate veterans would be of no influence whatsoever.