You can not live your life in a vortex of 'what if'
You could be hit by a meteorite, but that doesn't stop anyone living their lives day to day.
Covid has as much chance of simply dying back into a cold as it does morphing into something worse. You have no idea what the next stage will be, but you can't live your life saying what if this, what if that. The point is delta is actually becoming milder, but that doesn't suit your narrative. It is now producing more and more like a cold and less and less like the old covid symptoms.
The fact is covid is now under control here. It is not morphing into anything dangerous and so must live for the moment, and enjoy what we can now. Because if your prophecy of doom does end up being correct by some miracle, you will wish for these days back. You wish you hadn't squandered the only opportunity to make the most of the summer days and the happy moments that are now possible.
You can sit and come up with any number of prophecies of doom, anyone can do that, nothing is guaranteed in this life so you can either waste your chances or make the most of them. The choice is yours milky
I would have a long cold look at the way you are framing risk, and how you are managing to turn around the best news into something sinister.
We are doing really well as a country!! What more can you ask for!
Honestly I am exasperated by the relentless negativity.