>avoid

You just said avoid. There is no avoiding just delaying. You still have this impression this practice is done purely to "avoid" taxes. You don't pay interest on a huge loan to delay paying taxes.

>If the collateral raises faster than the interest rate, this can be extended to add on more debt load in total. Using this is risky

the banks that are giving out the loans don't like risky

>The loans will also let them do better timing with sells.

You're just reiterating what I just said.

>If they manage to delay the repayment until death

Banks are in it to make money. They aren't going to let Jeff Bezos take out a huge loan and not pay it back for 40 years.