Insurance companies do not crave float (aka reserves and required capital). Capital requirements in the life insurance business are onerous and interest rates are at historic lows. Regulatory requirements encourage diversified, highly-rated, fixed income investments, so the spread on what products are crediting (e.g. whole life, universal life, etc) vs. what bonds are earning is greatly diminished.
Companies and investors would rather have minimal capital requirements with high income cashflow from underwriting profits. This is the reason that the main benchmark of insurance companies is Return on Equity (ROE).
I guess it's life insurance that's a special case here, in that customers sign up to pay a flat rate for (say) 20 years but the chance of payout is much higher towards the end. When you close down & sell your insurance business to your competitor, a policy that's half-way will surely count as a liability, and so it may be very expensive to wind things up: you'll have to hand over a lot of the float to get someone to take the contracts.
There are various values for "you" here: The professional who manages the fund day-to-day needs to be paid no matter what the company says it does. The owners have a choice of whether to sell the car-insurance side of their business. And people looking to start a new business from scratch have different concerns.
1. Take in $100 of premium, and put up $10 of your own money. Use that money to buy $110 of assets.
2. Set up $100 of reserves. Your $110 of assets is now backing $100 of reserves plus $10 of regulatory capital.
3. A year later, your assets are now worth $113, and you owe a claim of $100. Sell the assets, use $100 of proceeds to cover the cost of the claim, and keep the $13 that's left over.
Congratulations - you've earned a 30% annualized return on your $10 investment, despite the fact that you purchased assets yielding ~3% and didn't make an underwriting profit, because you were effectively able to lever up 10:1 at 0% interest.
The catch is, if claims had been ~3% higher than expected you would have broken even, and if they were ~10% higher than expected you'd have lost all your money. If you were a hedge fund instead, you wouldn't have to deal with that risk (or with any of the other aspects of running an insurance company), and you'd have much more flexibility in terms of assets. But you could only lever up maybe 3:1 instead of 10:1, and your cost of debt would be much higher.