Does that go for Buddhists and Hindus and Muslims? I would say that they all honestly seek the truth. They believe Buddhism and Hinduism and Islam to be the truth. The generally don't turn away from their religions to become Roman Catholics, but it would objectively appear that many of them, indeed maybe most of them, are seeking what they believe to be the truth.
Will all be well for them?
Really? You can say this? You can say they are all honestly seeking the Truth?
Would it be your contention, then, that God is withholding the Truth from them? That, essentially, the Calvinists are right. That there are only those whom God predestined to know the Truth and that all others, even if they are seeking the Truth, are doomed to Hell?