Capture The Objective!

Just finished a siege game that ended 3-4. It was really close, down to the wire stuff. Throughout the entire game, our Willow and Strix kept spamming, "capture the objective!" over and over. Yet in the end, Willow had 35 objective time and Strix a big goose egg.

I realize they're not traditionally point holders but in my mind, doesn't it make sense to try to get on the point when it's coming down to it? I doubt care what role I play, if I can help grab some objective time when my team needs it, I go for it. But given how seldom I see others doing that, am I approaching it all wrong? I mean, I've been Strix and gone in pistol blazing when we were about to lose. Am I missing the strategic advantage of standing back and sniping while spamming for everyone else to take the objective?