The creeds go straight from Christ's birth to his suffering, leaving out the private life & active ministry of Jesus. The reason is that they're not doing a general biography, or even a Gospels précis, but teaching incarnation & atonement for our salvation.
Some catechisms and all good extended commentaries on the creeds will insert a little bit more here. Sometimes they'll ask, "when did he suffer?" and answer that it's not just "under Pontius Pilate" during the final week, but that his entire life in the flesh included suffering.
Every mystery of the entire, undivided life of Jesus is glowing with revelation and burning with the power of salvation. But "born of the virgin Mary, suffered under Pilate" not only suffices by framing his life correctly; it also directs attention to the most important things.
This is an argument about a silence, not an argument from silence.
