Bull. Per your last sentence... All of the profits are available to pay higher salaries to nurses and all others actually providing care.If the insurance companies are keeping profits, that means they are not paying that money to the providers, who employ the nurses.
If you really think the government is going to do a better job, you need to rethink that.
They are making those profits under the current "Medicare" system. Under "Medicare for All" they would make more.
The Forbes article isn't talking about profits from the healthcare provided by employers and the ACA exchanges. The insurance companies are profit-limited in that line of business under Obamacare rules.
They are making those profits administering Medicare, Medicaid, and through selling Medicare supplements.
In any case, none of that money is available to pay higher salaries to nurses.
Those who invest in health care corporations, I mean invest in health care companies as a way to glean profit, and then take out profits, are the reason that true providers such as nurses don’t make salaries commiserate with skill sets and efforts.