I sometimes read or hear people, mostly teachers, saying that singing in pure chest voice is what is most easiest for a singer. When I sing my easiest notes I sing a little higher and don't use pure chest voice. I don't really like pure chest voice. Perhaps I use what some call mix voice. It's confusing why they would say thigs like this if it isn't true for all people. To me this sounds a bit like "one size fits all" but I am not an expert at all so I should not have a specific opinion. Two examples:
I went to a choir director for an audition. She asked me to sing a certain melody. I said that F#m is the key for me. She told me to sing it in Em.
I went to a singing teacher who would play hymns on her piano. She told me to sing them in the key they are written in in. Hymn books have keys for low voices. I did not like it. I sometimes wanted to sing a major third higher. SHe never told me I Should sing much higher.
Why do many teachers say that singing in pure chest voice is what is easiest for singers?