Oh I quite agree! But our hearts are restless until they rest in Him, so God has given each heart a desire to seek Him. But you are right, everyone has a choice to be ignorant or reject His grace.
I did not claim it is “all up to God”. He of course is the only one that can judge the human heart, but we who know the Truth are duty bound as one beggar telling another beggar where to find the bread. And every soul is duty bound to seek after Him to find Him.
Let us labor then for the food that does not perish!