what scylla is trying to tell is that although you can get into a program in a college that gives ESL, the visa office may not just let it slide by that you have ESL now so no need for IELTS. They would still like to know why you are taking ESL, what is your future plan, why not try to improve your IELTS score etc etc.
I am guessing you were rejected before due to IELTS so definitely, VO is going to look into that matter.