I had forgotten how easy it is to rile up people in webnovel, so I'll go ahead and explain.
The one seeing Alex's "Destiny," has no idea Alex is an anomaly beyond his immortal comprehension, right now all the timelines involving Alex are written in sand.
And what is written in sand can be blown away.
—-Corn, why didn't you put a hint or something?
Well, the one seeing his future, thinks his knowledge is infallible, so why would he doubt, as of now, Alex has been walking on the path he had seen, EMPHASIS on as of now.
—- Will there be tragedy?
Not much, the last arc is the one that will have the most tribulations, but beyond that, tragedy will be kept to a normal degree.