>It's the same pathway that people use to take a loan against their property and other assets, and having to pay tax on that is absurd
you bought house for $600K cash (for simplicity). Some years later the house appreciated to $1.5M, and you take out a $1M loan against it - you are obviously realizing a $400K of the value of the house as otherwise those additional $400K can only come from thin air. So those $400K of the realized value of the house (not the loan) need to be taxed with the house adjusted cost basis becoming $1M. If you sell the house later for $1.5M the remaining $500K would get taxed as the difference between sale proceeds and the adjusted cost basis.
you bought house for $600K cash (for simplicity). Some years later the house appreciated to $1.5M, and you take out a $1M loan against it - you are obviously realizing a $400K of the value of the house as otherwise those additional $400K can only come from thin air. So those $400K of the realized value of the house (not the loan) need to be taxed with the house adjusted cost basis becoming $1M. If you sell the house later for $1.5M the remaining $500K would get taxed as the difference between sale proceeds and the adjusted cost basis.