ICU beds require something like 7 specially trained nurses each to operate. Generally, availability of trained staff is the limiting factor (developed countries, at this point, generally have more ventilators etc than they can use), and lead time on making new doctors and nurses is pretty long.
While a nurse is hard to train in 2 years, you can start pulling doctors and nurses from adjacent specialties and cross train them for COVID ICU wards.
If we are going to see constant new variants and new waves, then its the only choice we have.
At that point you have shortages elsewhere (and that _is_ happening to some extent in some places; hospitals are delaying routine procedures to keep the ICUs running at full capacity). It's not a great solution, especially if it goes on a long time; when you start delaying routine things for years, you start seeing serious problems.
Realistically, the only viable course is probably to vaccinate and boost as many people as humanly possible, and await better vaccines and therapeutics. Paxlovid should hopefully help when it's available in quantity.
