Well this topic is relevant to me. I do financial planning, which most of the time involves auditing existing coverage clients have or getting the ball rolling on new policies. The vast majority of the time we see people uninsured or underinsured. (A lot of the time their insurance guy sold them the wrong coverage amount in the wrong type of policy.)
The common mistake I see is people only covering their liabilities (mortgage, other debt, and education costs.) They ought to be digging a little deeper and finding the present value of their current lifestyle and insuring for THAT.
With that said, since I'm the breadwinner in the family and my wife would struggle finding a job that comes close to what she and my daughter need to survive, I have 3.5 million on me. Laddered into various duration term coverages. 500k of which is earmarked to convert to permanent coverage when I have the means to start contributing to that.
If you have dependents you NEED to look into coverage.
Not to self promote, but if you want advice, just reach out via PM, you don't have to go through me but I'm happy to help.
If everyone dies eventually how do these companies make money?
As stated, most people have cheap term coverage that pays out 1-3% of the time.
Permanent coverage is a much more limited use case that makes A LOT of sense for some people and 0 sense for others. The premiums on this coverage are designed to be profitable for the company after the policy is held for a certain amount of time (usually around 15 years.) People get these policies because they get favorable tax treatment on the living benefit side of things and because they help sort out estate issues.