You never know.
I've had two bad water pump seals. Both were in fact shaft seals that failed (not block sealing surface issues.) Both kits came from a well-respected vendor. One made it ~75k miles, the second four years and about half that. The first was a "well, meh" sort of thing given that it was beyond the OE's original service interval -- the second I was less-happy about.
And... when I removed all the components to do the job after the second what did I find? The lower idler roller (not the big center one, the small lower roller) had a bearing that was a bit sloppy. Everything else (other than the water pump, which was leaking from the center seal and very badly-so to the point that it drained a hell of a lot of coolant all over the driveway over a couple of days' time) was in perfectly-serviceable condition. Was that roller condemned at that moment? No. Was there ANY reasonable way to inspect that and thus know it was in trouble short of pulling the belt? Nope. Would it have gone another 50-60k miles without the bearing seizing or coming apart and screwing you? I wouldn't take that bet and if it did fail guess what happens.... yep.
You just never know but the OPs picture indicates FOD somewhere in the belt path, likely at the crank pulley since that's the obvious place where something could get in there and do that sort of damage. If the crank and cam are still in time then the engine is probably ok, but if not then its a near-certainty there has been some kissin-cousin action going on where its not supposed to.