We can calculate the orbital paths for those objects so far ahead but not with the accuracy it would take to know whether it would hit earth. Space is big and the further out you extrapolate the bigger the error bars get.

You're after something like this or wikipedia?

No need to be paranoid, some orbits are just more difficult to extrapolate than others. Apophis passes by the earth and the moon regularly, that makes calculating orbits hard because it changes in hard to predict ways each time

So you have some examples/sources eto back up this claim?

There are differing levels of information for asteroids/NEOs. There are thousands of them out there. The calculations of potential impact change regularly. But NASA is giving you 100 years. Give it another 50 and see what changes.

https://solarsystem.nasa.gov/asteroids-comets-and-meteors/asteroids/apophis/in-depth/

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