OG Catholics have fertility rates around what Haredi Jews have, so the answer is basically yes. With caveats.

The Tridentine Mass also has a homily. I like the Norvus Ordo done in a reverent manner. However, he prescripts of Vatican II were abused. Latin was supposed to be maintained generally. Music was supposed to be primarily Gregorian Chant. Communion on the hand was allowed because people were doing it and there was a desire to prevent those people being in sin while it was corrected. Instead it was allowed to spread and become entrenched. The Church needs to focus on preaching the Truth a specially the hard controversial ones of our time, an increased focus on the Sacraments (e.g. more daily Masses, especially daily Confession, moving Confirmation to before first Communion---this last one predates Vatican II), reintroducing the mystery and reverence of the Eucharist by switching back to Latin, mandating kneeling during reception of Communion and on the tongue only.

>moving Confirmation to before first Communion

Yes that will fix it.

My gf did confirmation because you get loads of presents, which is an easy sell to a child.