Is the name secularism really that helpful?

See, for example, the Pope's Address to his Aides in Latin America:

"growing influence of post-modern hedonistic secularism"

But isn't it the case that secularism is not a thought-out system of beliefs, but rather acting in accordance with what one takes to be the fundamental goods in one's life? The same could be same of secular humanism, though there can be a speculative part of secular humanism, consisting of arguments against the existence of God and such by committed atheists. Whom does the secularist or the secular humanist take to be the center and focus of one's life? Man, though ultimately himself. Are there secular humanists who worship an abstraction, such as humanity, or the collective, the human race? Perhaps. But when the Holy Father is talking about those who are entangled in secularism, the majority are simply those who have alienated themselves from God to one degree or another.

Should we not just call sin sin? Even if it would offend, would it not be the reality? If we call sin sin, we know what the solution is--grace and prayer and evangelization, not an attempt at "Natural Law" advocacy or mere political mobilization of the faithful (even if that is necessary for them in order to exercise their citizenship and concern for the common good responsibly).

I don't think the Church Fathers and the heroic bishops of the Church shrank from calling sin sin or vice vice. They at least knew where the remedy lay, and preached Him, our Lord Jesus Christ.

James Hitchcock, What is Secular Humanism