If you're good the only time should need to play the obj heavily in order to win is if you're teammates are full of split screeners or there is a full team on the other side. Outside of those scenarios a good player doesn't need to play the obj heavily in order to win, winning is usually a given for must good players.
GT: drbaus || Pokemon White FC: 2021 9043 9909 Dat fish cray || NYK 2013 NBA Champions
9 times out of 10 the entire team will treat it like TDM and if I have a friend with me, usually they do too, the amount of times I've taken the objective and said "where the hell is my team" is countless.
Strictly by the wording in the title, C. It is a popular excuse, yes. But nearly as often, "playing slayer" is just an excuse for mediocre players to inflate their K/D instead of playing the actual gametype.
C. Every team needs slayers. Eg in black ops, throw out a blackbird, chopper and dogs. Triple cap while everything is out and you'll get a win.
That only works in the following scenarios: A) The other team is bad/stupid and not only lets you get those streaks in the first place, but doesn't have at least one player packing CSPs and/or doesn't immediately shoot down your chopper. B) The game is very closely matched, and despite the other team using appropriate countermeasures quickly, it still buys your team enough time to barely pull ahead.
In scenario A, you would nearly always win without those high streaks anyway In scenario B, your team would almost always be better served with you actually trying to cap instead of just playing "slayer."
People die so easily in CoD that you really don't need dedicated slayers, at least not in matchmaking. Any competent player should be able to do everything. In the tremendous majority of cases, in my experience, the guy trying to "support" his team by focusing only on kills never gets those streaks and basically ends up being a wasted player slot.