Hello,
I was in the same situation as you where all of my documents are as per SDS requirements except for medical. I know lot of people who did as u are thinking i.e. say yes and enter SDS and later gv the immigration thumbs up by giving LOE. I personally felt that this is slightly misleading, as if IRCC has put a pause on up front medical which means they are aware of it and no need of attaching a LOE. I have applied in Non SDS fingers crossed and all the best to you for your application.