Please come up with ONE documented example of this happening.
Google is your friend. I’ll wait.
***
That said, the thing is that while it may happen, it’s so rare as to be practically never. You probably won’t find any entries on Google about the timing belt failing before interval. You can pretty much count on it not happening.
Now, after the belt is replaced the first time, if someone screws up the install all bets are off.
Finally, Nissan designs the water pump in such a way that if it DOES fail that it doesn’t leak on the timing belt - the weep hole for the pump is outside the sealed timing belt case on all Nissans.
Oil leak? Same thing, cam seals are more or less outside the sealed timing cover.
My old Volvo had the oil pressure sender inside the timing case. A small leak from it was responsible for a couple of timing belts getting eaten before a mechanic noticed it and fixed it while in there for the timing belt. Sounds like Nissan has it pretty well figured out.