It's my experience that most architects, and certainly most "below median" architects, only ever design one building. Everything they design is a variation on the same theme, whether it's a bank or a house or a library (and certainly if it's the ninth house they've designed this year). Their theme might evolve slowly over time, but it's rare to find an architect capable of producing actually-new work based only on the client's wishes and the requirements of construction. This is why you're best off finding an architect whose buildings you like rather than trying desperately to convince any particular architect to change her style.
So, if most feasible designs do not have this light-focusing property, most architects will never run into the problem. However, an uncreative architect who does somehow produce this effect, may be expected to do so repeatedly. Hmmm, that seems to accord with the record here.
Lets align the desks so no one can see anything due to the glare in the afternoon (LOL better yet if no blinds/shades for artistic stylistic reasons)
Hmm, putting a big monitor in the conference room? Eh who cares if no one can see it due to the sun.
It would be like mech eng pretending column buckling doesn't exist, or programmers pretending users never make data entry errors.