So you are saying ineffective lockdowns are ineffective.
I gave a specific example of Melbourne and I was implying a specific timeframe when their lockdown went into effect. They went from having uncontrolled community spread, with tens of thousands of infections, to actually zero. They did it by having a very detailed plan, strict enforcement, high compliance, and an excellent testing regime. They also had clear goals and thresholds for lifting restrictions and communicated them to the public.
I generally agree that ineffective lockdowns mostly just slow down the spread. The spread picks up again exactly in proportion to restrictions being lifted. However, effective lockdowns have actually been able to eradicate the virus completely from whole areas: from Melbourne, from Victoria, from all of Australia, New Zealand, and several Asian countries. You need to be able to quarantine international travel and have high compliance. The places where the virus have been eradicated have to remain on high alert and remain extremely vigilant until they can roll out mass vaccination. I spent 10 months in Australia during the pandemic, 99% of the time stuck in the ACT. The extreme vigilance was contact tracing, social distancing, and some restrictions. There wasn't a mask wearing mandate, ever, because they never allowed uncontrolled community spread.
The US and European countries cannot meet those criteria, so they have the virus simmering until they can roll out massive vaccination. The US and Europe were too slow to take the pandemic seriously because their political leaders rolled in BS and denial for months and seeded their idiot followers with denialism. It's too late for them, and the only way out is vaccination. And yet, some idiots are still rolling out conspiracy theories about vaccination and want to f** that up, too. It's so disappointing.