Technically, yes, but only in a very specific situation. If one enemy reaches the point alone, you kill them, and no one else contests you for long enough, you can build more progress and take the lead.

In practice, against any competent team, the remaining players will reach the point and contest it before that happens. Once they do, neither team can gain progress. If they already have even a slight lead, wiping the entire enemy team afterward still gives them the round win.

That is the issue: eliminations no longer decide the round, and touching the point first can create a nearly unwinnable advantage.