Come on guys -- go back to some of your first posts on TLS -- we've all made our share of posts that seem to have laughably obvious answers now.
To the OP -- Schools hand out fee waivers of this sort to serve their own interests. Their interests can be, but are not necessarily in concert with our interests. Schools give fee waivers to potential applicants who fit demographics they feel will enhance their applicant pool. The catch is that one way an application can enhance their applicant pool is by being rejected. The ratio of acceptances to rejections can help their USNWR ranking. So, while a school may hand out fee waivers to auto-admit applicants whose scores would boost the schools LSAT/GPA numbers, they may also hand them out to other applicants who really don't have a very good chance of admittance. Other demographic info can also trigger fee waivers, such as ethnicity, sexual orientation, or geography.
In other words, getting a fee waiver is great if you are interested in applying to the school, but it doesn't necessarily offer any predictive insight to your chances.