You don’t need insurance if you’re retired (generally speaking). If you’re retired and your children are taken care of, you’ve paid off major debts and you have sufficient savings for retirement you should be fine. If you’ve planned your finances well, life insurance won’t be necessary.
If you’re young, single and debt free, you probably don’t need insurance either. If you have no dependents, no debt and no plans to start a family or incur serious risk, you probably don’t need it.
However, if you aspire towards home ownership or starting a family, having a preliminary conversation might make sense. In certain cases, disability insurance and critical illness insurance should be considered, but might not always be a good fit.