That's right ! It is the point 3 of the rejection reason that application will be refused if ECA is not uploaded.. But reading CIC instructions again and again you will know they are not actually required. One could always add some extra effort and get it scanned and upload, however, it is not a necessity as per clear instructions. I am sure if it happens, one could open a CSE and point out at there own website that it is not required, if it is required by any chance then CIC will let the applicant know about it !
So you are basically saying if you don't need any adventures then upload ECA and IELTS in Education section along with your diplomas?