Irresistible Grace (inherent in 1 Corinthians 13:8a and Revelation 19:6 (kjv)) demands that there is either Limited Atonement or Universalism..
I reject Universalism; therefore Limited Atonement is my belief on the matter.
Those two radical, unbiblical inventions in the late 16th Century - one by hyper-Calvinists and one by hyper-Arminianists - are not the only two options!
Both NEED to say that because it's easy for each to rebuke the other, then both use the very illogical and silly argument that because the other is wrong, ERGO they MUST be right (end of discussion). It's a bit like saying "Because that car is not white, I MUST be right hat it's black and need not substantiate my position." Maybe it's red, lol
Historic Christianity does not eliminate faith from the discussion. When faith is regarded as relevant, then we find another option. Some have faith to apprehend His death (and thus benefit) and some don't (and thus don't). It's not that Jesus is lacking in His work, it's that some people are lacking in faith in that work. God doesn't issue fake, fraudulent, not-paid-for gift cards, some just don't use them.