In Cannon Reason for human weapon designs

Never posted before but had a thought about something I've seen a lot of people say when talking about the guns in Halo.I feel like we've all seen those videos of real gun experts railing against halo's weapons for missing sights. Specifically the magnum and the assault rifle.

Is it possible that that was an intentional design choice by the UNSC to make this weapon harder to use by insurrectionists when captured or looted?

Marines have those glass eyepieces on their helmets, which would assist with aiming and give a link to the weapon but insurrectionists wouldn't have those, and based on existing canon marine helmets can be tracked so it's much harder for them to capture them without being caught. By the time of the war with the covenant they were just in mass production already so they just used what they had, but they had been specifically designed as a solution to a specific problem. With the lack of standard iron sights and just using your eye without a reticle would significantly impact the accuracy of insurrectionists making them less dangerous.

I'm only a fan of the lore on the surface level I read a few of the books when I was younger and caught a few lore videos so theirs likely an alternative explanation or something that contradicts this in some book or novel let me know. But I simply thought that this was an elegant solution to a inconsistency/gap in the games lore.