It really isn't. It gives them a big advantage, because of an external device that many people don't have. I don't care if people use headphones, but the audio for enemy footsteps should be dropped so that headphone users don't get the large advantage they do, so that sound whoring isn't possible. My argument was much more thorough than simply "headphone users are cheaters" which is not what I was saying.
You have the choice of running dead silence and then your back to normal playing field, so you have a choice.
Each of the perks is a choice, a ninja dead silence player - just run scavenger and throw lots of concussions is an easy win..
Silencer makes guns into pea shooters, and you also need blast suppressor and ghost to be totally silent. Thats Ghost, blast, dead silence and silencer, thats allot of perks and points and then you get flash banged or naded.
If your team mates are around the next corer, then you can run. If there are no team mates around the corner then check your normal camping / set up points then you move forward slowly. Chuck an emp and see if it gets a marker...there are lots of strategies.
Lets face it, when you know the maps, most decent players know the routes and where people are coming from 95 % of the time.
If you are getting surprised all the time, you need to learn the maps, spawns traffic and camping spots. I am prestige 4 and I dont get surprised much anymore..
Being loud can also be an advantage if you are in a power position and have a strong AR, sitting there head glitching with tac mask and a flack jacket - you want people to run to you and you can see where you team mates are and know the traffic routes.
So, no, I totally disagree with everything you have said. Its harder to rush and flank being loud yes, but defensively its better with tac mask and AR, and being quiet is no benefit if good players know you direction of attack, which is normal.
When doing gold guns you have no perks for a while, guess what, dont play the flanking game then.
Tac maks and flack is for getting stuck in, stealth perks are for flanking....its a choice.