The other problem is that many of us have also benefited from the lockdowns, so it's a secret temptation to want endless excuses for other lockdowns.
I think we are seeing a combination of more resilient viruses with modern medicine (because evolution is a real thing and life finds a way). Since the world has never been more interconnected, viruses and diseases, in general, travel faster and further distances.
Only time will tell if this Covid-19 round 2 or just another attempt to sell Infotainment to an already shaken society recovering from a once-in-a-lifetime pandemic, vulnerable to this situation repeating so soon.