Except that. if in my age group bracket, the vaccination that you received is now deemed to be damned near useless and, because of factors unfathomable, you will not be able to get a booster for another month.
That despite the government-run campaign exhorting us to "just go and get a booster".
I'm in the 'at risk' group as well, my folks are well into the high risk age group and so on being well over 60 and some in their 80s. The vaccine does not 'stop working' at 5-6 months, it just starts to reduce in effectiveness, so where it had 90% protection it might drop to 60% protection, the booster just kicks it back up to higher levels. Really just depends on what you consider acceptable protection for the circumstance. If Omicron is as docile as stated then even with 50% protection it probably would stop any severe infection, just the problem if you encounter any remaining delta, which is still circulating in Melbourne.