[LeGrande]

The system is always disturbed by an observation having been made.

Yes of course, but the uncertainty doesn't arise because the observation disturbs the system. The uncertainty is inherent to the system.

[Alamo-Girl]

The point you are making is further described on this Wikipedia: Uncertainty Principle article.

The point we are making is further described on this Wikipedia: Wave Function Collapse article.

They are not mutually exclusive.