As with any knockout tournament, you want the best players (or teams) meeting at the latter stages, be it snooker, tennis, Judo, football, etc so seeding is done to try and keep the best apart in the early stages. It's perfectly normal and accepted sporting practice. The football world cup is a good example. It is also normal practice in pinball.
I am not trying to "write the rules myself" merely following best sporting practice. At the end of the day you still have to turn up and win enough of your games if you want to qualify regardless of who you play.