The OP is getting terrific value here.
(This is going to be fun).
OK, I'll play. I'll happily contend you're wrong there.
It's the difference between not understanding whether the pump an engine is supplied with has the characteristics you require, which are themselves unknown - but committing to a pressure characteristic prior to designing your coolant system - and being noncommittal about what's required of a pump when there's little understanding about what's inherent in the broader system it supports.
I'd find it hard to believe that KTM designed this particular engine, the engine calibration, the coolant system and the like around the water pump. So why would you design an FSAE car around one? You'd have to have, as you suggest, "very little logic or common sense" to do this.
If a design lends itself to a place where an engine-driven driven pump is suitable - let alone the very same one that comes with the engine - then so be it. As this isn't a given, don't bet on it. Granted, the same assembly or parts thereof probably appear on a number of engines for reasons of resource rationalization and economy of scale (at the least). it likely works in a number of scenarios. Assuming it works in yours is silly. Insisting that it needs to... is stupid.
Let alone that you're betting on the characteristic the pump provides beign a best fit for use, all integration factors considered.
No, it fundamentally moves the design process beyond that particular decision by adding degrees of freedom (pick any pump you want to design what cooling system you need) vs an inherent limitation (design your cooling system around a given pump, which was designed around a different application and different constraints).
If at the end of this journey what's required can be met with the pump on the engine, so be it.
Designing a cooling system around a pump, when there's so much flexibility in choice at negligible penalty in so many areas... is illogical.
If you're still talking in terms of flowrate, you're fundamentally not understanding what a pump does and how to design accordingly. As an aside, if by chance you're planning on turning up to FSAE-A 2014 this much understanding about coolant system design, I'd revise a bit first.