Your IELTS score is impressive, but good SOP will boost your application.
I have seen many cases with excellent IELTS score, but got rejected due to poor SOP and application.
Yes you can apply but not under SDS program.
Concentrate on SOP, I believe a good SOP and application has more impact than Ielts. In general category you may submit your visa application without IELTS; but you must have unconditional acceptance letter from your (DLI) institute.