No, it's you claiming it a fact when it's still really just an opinion. A more dramatically presented and no doubt widely-held opinion, but still an opinion nonetheless.

Yes, no doubt it's an opinion that I'd be inclined to agree with as it applies to myself. However, having spent my first few years in the Army around guys who couldn't hit the broadside of a barn from indoors with a 1911, yet who became very proficient almost overnight with the M9 when we traded, an opinion I wouldn't be quite so bold to apply to everyone else in a universal sense. There is much more to accuracy than design and mechanics.

As well, having owned a match-tuned M1911, it's fair to say that given any number modifications and upgrades, the 1911 is capable of extreme accuracy. However, that the modifications are necessary in the first place ought to be a clue to you in that in its pure, mil-spec mode, it's not exactly "ideal."

Just because you think something should be a fact does not make it so. Cut-and-paste the following statement into Google and see what you find:

"The 1911 is well known for being one of the most accurate pistols ever made"