It is not perpetual.
With more people becoming vaccinated and herd immunity (through both vaccinations and infections) gradually building, each wave will be successively milder, until we can live with it.
Building more hospitals is not a solution, as we can’t staff them. And just nicking poor countries’ doctors and nurses is not an ethical solution either (before we hear it is all the fault of Brexit).
What we need is to attack COVID on all fronts: vaccinate the whole population, mask wearing and social distancing in the short term, and developing more home grown doctors and nurses and fundamental research in the medium term.
The delta variant is an annoyance when we would have had herd immunity, but ultimately no pandemic lasts more than 2-3 years and I suspect this winter will be the last dangerous wave.
At the moment we are playing fantasy normal life and creating a lot of problems 4-8 weeks out.