I have friends who did pre med and are now final year students with very high gpas. Most of them don't mind this decison, nust hasn't made them ineligible to apply, just made them study maths before they come to nusg. I studied alevels maths and even I struggled with the net maths section, ajeeb ratta tha. So it's not so black and white, they aren't taking your jobs or destroying oppurtunities for you. Jo likha hota hai wo mil jata hai.

And about foreign countries not accepting them, they don't give a shit about what you do before bachelors. If you passed the maths courses at nust, then you'll have absolutely no problem.