You just claimed your SysV init scripts are helping your software take advantage of cgroups.
If that's what you read, you need to practice your reading skills, cause they suck.
What I pointed out is that cgroups are separate from the init process, and can and do indeed run on sysv init systems too. cgroups has nothing to do with init, and runs separate from init no matter what you use for init.
When you brought up cgroups as an argument, it appeared to be from a false belief that systemd was needed for cgroups to work - in fact, it's the other way around!
And when systemd uses cgroups, it takes them over for its own purpose, which lessens the value of cgroups compared to systems where you are free to use cgroups from scratch. Freedom to choose - that's what makes Unix great. Poetterware takes away that freedom.