Barriers.

Fear of the unknown.
Fear of looking stupid.
Premature judgment of ideas.
Attachment:
- to old ideas.
- to past successes.
Resistance to change.
Reluctance to explore better methods.
Stopping at the first good idea.

Dorothea Tanning

Art has always been the raft onto which we climb to save our sanity. I don't see a different purpose for it now.