User blog comment:IamJakuhoRaikoben/Chapter 382: Alegria, Review./@comment-24467372-20140428184225/@comment-7418318-20140428213828

When the substractive started to became rare, many of the "full" wizards discriminated against those with only the additive. Some by pitying them, some by outright hostility and disdain.

By some the lack of substractive magic was considered an illness that they tried to cure, while others argued that with only additive magic, they shouldn't even be considered wizards and should be barred from the Wizards Keep.

How would all that make sense if only very few could use their substractive magic?