It's a demographic and socio-economic thing mostly.
Some history..there was once a Maine North High School, and when it closed in June 1981, most of their students were absorbed by Maine East. I graduated in 1981 from Maine East, the last class before Maine North closed, and we had 755 students in our graduating class. For the class of 1982, they had over 1400. Enrollment had almost doubled.
To alleviate this, District 207 decided that people who lived in the north end of Park Ridge in the traditional Maine East district, could go to either Maine East or Maine South(at the time the "other" Park Ridge school...now "the" Park Ridge school).
At the same time this was happening, Park Ridge was transitioning from a nice, upper middle class suburb to a very nouveau riche north shore wannabe suburb where nice old homes were torn down left and right and replaced with McMansions...especially the area just around Maine East. As that occurred in Park Ridge, while not in the Des Plaines / Niles / Morton Grove areas that Maine East also took in, the McMansion owners more and more sent their kids to Maine South. While the rule of either school is still in effect, nowadays almost
no one who lives in the north part of Park Ridge sends their kids to Maine East.
Right next to Maine East is Lutheran General Hospital, which also underwent major expansion in the past 20-30 years. Because of that, alot of the area around the hospital..in Park Ridge and other suburbs, became much more doctor centric (when my parents retired down to Sarasota in 1994 doctors bought their house even..), and as a part of that it became much, much more ethnically diverse. If you look at the cultural makeup of Maine East, it's about a third Asian and about a quarter hispanic ->
https://www.illinoisreportcard.com/...=studentdemographics&Schoolid=050162070170001).
How this all related to football, is that Asians and Hispanics are not historically groups where a lot of kids play football. Because of that, they have low numbers, and need to teach a lot of kids the basics, and the result is usually a 1-8 or 0-9 season. They did have one year where they had a chance. They had a bunch of good kids, including 3 of the head coach's sons on the team, but they got hit by injuries and wound up 4-5. The last winning season the varsity had was 5-4 in 1983.
It sucks as a Maine East alum, as they once played good football there. My freshman year the varsity went 9-1 and beat Maine South 41-18...and Maine South was 1-8 my junior and senior years. Phil Hopkins wouldn't arrive until a couple of years later and change the trajectory of Maine South football. Hopkins and Inserra, plus the inherent advantages from
high socio-economic factors that exist in Park Ridge will for the forseeable future mean Maine South is always strong and Maine East is always an also-ran.