Tasers are bad. Stun bullets too.

[Clarks]

Not to mention the taser IS your only weapon as security, at least ranged. Unless you're throwing flash bangs around so you can end up stunning everyone involved, you're useless in any ranged combat.

Do you have any idea the defensive advantage armor gives security? If a traitor is using bullets they have to get closer, or their shots will cause no stun and cause very little damage. If a traitor is using stun weapons, they have the same problem you do.
The majority of traitors doesn't even have a ranged weapon.

I can understand not wanting to make it too hard for traitors, but they have tons of advantages too like being hidden, plenty of gear, a possible second chance after getting brigged, etc.

Getting brigged and having all your traitor gear stolen or destroyed is so much fun. I bet every traitor who is not murdered on the spot loves spending half a round scrambling to get some kind of weapon and making a new plan.
A fight without a winner doesn't mean that you get killed by the traitor; it means you are going to have another fight later. Your late round is not boring anymore, wow.