All the promised benefits are assets. The unfunded assets are equal to the unfunded liabilities. See how that works?
Promised benefits are not assets, any more than the outstanding balance on a credit card is an asset.
Many of your claims are difficult to refute; that one’s easy.
Strictly speaking, since we’ve hit the crossover point where Social Security payouts exceed FICA taxes, and the program is promised to run in perpetuity, the unfunded liabilities are actually “infinite”.