I have an old book that I love called 'The Art of Fiction' written by John Gardner...  it discusses art as it pertains to fiction writing, but I think it applies to any form of art...

a few quotes from it:

'Art depends heavily on feeling, intuition, taste.  It is feeling, not some rule, that tells the abstract painter to put his yellow here and there, not there, and may later tell him that it should have been brown or purple or pea-green.  It's feeling that makes the composer break surprisingly from his key, feeling that gives the writer the rhythms of his sentences, the pattern of rise and fall in his episodes, the proportions of alternating elements, so that dialogue goes on only so long before a shift to description or narrative summary or some physical action.'

'In other words, art has no universal rules because each true artist melts down and reforges all past aesthetic law.'

'To the great artist, anything whatever is possible.  Invention, the spontaneous generation of new rules, is central to art.'

'Whatever works is good.'

Those are a few of his thoughts on the subject...  and I agree with him.   I think any tool is fine as long as it is used in a creative fashion...

M