That’s quite regional. Nationwide there is still plenty of ICU beds available, and presumably if it gets bad enough hot spots will respond appropriately.
By moving people with covid to other states, or importing medical personnel and equipment. Do so aggressively enough and you can keep capacity available.
And then you'll eventually realize: having thousands of people getting intensive care at the same time until everyone either had it or died from it is moraly not acceptable. Why do you come up with the idea that it's better to increase capacity rather than using large scale vaccination efforts?
Not sure where you get this about open up, but have you seen current ICU fill levels in various US states such as Alabamba etc?