This is the stupidest argument for sprint ever. Game play should always trump some stupid realism or immersion you need. Hey, humans can also throw rocks, they can also swim, and kick, and slide and dance. Do you want that in Halo? Spartans should be allowed to throw their guns as projectiles too. It's dumb to thing a Spartan will walk around with an empty weapon against an enemy rather than throw it 100 mp/h at their head to incapacitate them.
As much as you hate playing CE/2/3 without sprint, I hate playing Reach, Halo 4 and soon Halo 5 with it. Who do you think fits the majority of Halo fans, and who is in the minority? If Halo 5 again isn't fun and fans don't like it as much, then what? Would we again have the same arguments for Halo 6?