First, although there are no taxes, there is interest. When you borrow from your policy, interest starts accruing from day 1 and keeps accruing until you pay back the loan. If you’re using it for retirement purposes, are you going to pay back the loan? Of course not. So the interest keeps accruing. And that interest applies to all money withdrawn, including your contributions, which were already taxed.
Gap insurance covers the excess amount on your auto loan in an instance where your insurance company does not cover the entire loan. Depending on the company's specific policies it might or might not cover the deductible as well. This coverage is marketed for those who put low down payments, have high interest rates on their loans, and those with 60-month or longer terms. Gap insurance is typically offered by a finance company when the vehicle owner purchases their vehicle, but many auto insurance companies offer this coverage to consumers as well.
As for your question, I don’t believe I’ve ever reviewed a USAA whole life policy so I can’t comment on then specifically. I would simply encourage you to start by clarifying your personal goals and to then evaluate each option based on how well it will help you meet them. With that said, of your main goal is investing for retirement then I would typically encourage you to max out traditional retirement accounts before considering any kind of life insurance.
When you say “If you earn too much for a Roth IRA especially (180K plus for a household roughly) then whole life insurance is literally the only place to get tax free savings on growth”, I assume you mean other than a 401(k), health savings account, Backdoor Roth IRA, 529 savings plan, or self-employed retirement accounts. Otherwise that’s a pretty misleading/misinformed comment.
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As for your point about term life insurance, it’s important to keep in mind that the point of insurance is not to pay out no matter what, but to provide protection for the period of time that you need it. The fact that term life insurance doesn’t pay out most of the time is actually a good thing because it means that most people aren’t dying young. And in the meantime, you can use the savings from the cheap premiums to build your financial independence through other, more effective savings avenues.
In the United States, economists and consumer advocates generally consider insurance to be worthwhile for low-probability, catastrophic losses, but not for high-probability, small losses. Because of this, consumers are advised to select high deductibles and to not insure losses which would not cause a disruption in their life. However, consumers have shown a tendency to prefer low deductibles and to prefer to insure relatively high-probability, small losses over low-probability, perhaps due to not understanding or ignoring the low-probability risk. This is associated with reduced purchasing of insurance against low-probability losses, and may result in increased inefficiencies from moral hazard.