There are a multitude of “belief systems” but only one relationship that offers Grace. That is Truth.
You could be right
You're by definition using inductive reasoning. You could not have possibly studied every other belief system present across all mankind..
And you've ironically chosen the religion which happens to be the majority where you were born and live, much as people have done since the beginning of time. Geography is the number one indication as to what belief system you have.