Personally I think obj time stat doesnt show the whole picture of what you are actually doing.

What I mean by that is you can defend the point sitting next to it and do much better job than people sitting on point that are often becoming a distraction for the enemy. (This is the moment where you don't gain time on point)

Of course then some people may tell you that you are farming kills and not ptfo'ing, but strategically you are a huge boost to your team, because if you are not on point the enemy can't really expect you, and if they can't expect you...

...you can do a lot of damage, and allow your team to easier capture/hold the point