No I know he was, I'm not denying that part. But that was in his past when it was in his prime and likely way stronger (and also when he had both of his legs still attached). I just don't see how Oda would be able to bring him back in as a villain and make him relevant to the story. Films may be non canon but we still have images of Shiki being fucked over by pre-TS Luffy, that really doesn't make me confident in his current strength