Would it be safe to then say, if one is genuine in their faith, and hopes and wishes the best for others abroad, it may be safer not to proselytize Christianity to individuals whom have not heard of Jesus Christ?
Ignorance is not a guarantee for salvation. The point is that we can't know, but we can trust God--and God won't hold their ignorance against them.
The idea that Christians go to "Heaven" and non-Christians go to "Hell" really just isn't accurate of how the majority of Christians throughout history understand how things are. Instead the Christian confession is that salvation is found in Jesus, in what God has done in and through Jesus; which is why in Christ we confess we have salvation. The inverse would then mean that outside of Christ there is no salvation; but what we can't say is that simply not being a Christian in this life means a person is ultimately without Christ; just as we can't say that simply calling oneself a Christian in this life means a person is ultimately in Christ.
St. Augustine speaks of there being both wolves within and sheep without; that there are many who call themselves Christians but who are actually wolves, and that there may be many who we do not know today as brothers but who are, in fact, sheep.
I can know that here, in Christ's Church, there is salvation because it is here that God promises to deliver and apprehend for me the gifts of His grace through the preaching of the Gospel and the Sacraments; that here Christ is found and given and in Him I have salvation. Now is it possible that there are places where God is feeding people Christ outside of the Church, outside of the revealed means given to us? Sure--but I have no way of knowing one way or the other; but it is certainly possible. And I am hopeful that there are many who have never tasted of Christ from His Supper that, nevertheless, will have their rest in Him by the kindness of God. Whether we are talking of the unevangelized or even our next door neighbor who, perhaps having been spoiled against the word of Jesus through wicked preachers, would never even conceive of stepping foot into the door of a church. How should I know what things God is doing when He does not tell me, and who am I to question the Almighty's goodness?
The conclusion is not "it is better to say nothing because there is a better chance of salvation if we say nothing" but instead, "We know through the Gospel that God is the Savior and Friend of sinners and He comes to us here, let us be hopeful for the sake of our neighbor, trusting in the kindness and love of the God who saves us."
The Christian confession is not, "If you belong to our tribe then you are saved, and if you do not you are damned." The Christian confession is, "In Christ God was reconciling the world to himself, not counting their trespasses against them, and entrusting to us the message of reconciliation"
-CryptoLutheran