Most system administrators perform a lot of different tasks that are not always clearly identified as separate responsibilities so I would definitely take some time to list them individually. Deploying GPOs across an IT estate seems like an atomic task but it also involves asset management, risk management, etc. etc. to manage it successfully. The same goes for firewall administration, patch management, and a load of other tasks you would perform on a daily basis.
I would say it is definitely worth it to sit for the exam and go for the Associate of ISC2 if it turns out you're not having the required years of experience.
Ok, thanks for the answer. Indeed, my option is to sit for an Associate degree for now and make these questions to be my problems for the next 6 years available to validate the necessary work experience.