What's your view of a person who have endowment plan as a backup n invest freely n more daring afterward knowing the back up is there

You can consider using signature product as alternative to endownment plan.
Comparions as below:

Endownment plan (E): Low return. Breakeven year 10 Years above. Must stay throughout the saving period (Normally pay 5 years, then wait for 5/10/15 years before you can take out). Maturity benefit only at the end of the period. Lack of flexibility to use the return.

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Signature product (S): Higher return. Breakeven year 8 Years. Any time can terminate. Monthly income & capital appreciation on the account. If terminate half way, surrender benefit pro rated according to the number of years stayed with this product. Flexible to use the return.

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The yield can be 8% to 13% if leverage. So I would suggest don't need to put too much to this product. Just to diversify the retirement basket of eggs. $70k to $100k is sufficient.

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I like this feature: - If no urgency of using the money, it can leave as legacy somemore, generating income for next generation or use the capital for their house.

While probably not the best option as a "backup plan", the idea behind the strategy is good. Endowment plans are lower risk in general that promises a minimum pot of gold at a certain point in the future. Having a minimum "guaranteed" amount especially at a point where you are certain you need money, would give one slightly more freedom in terms of going for slightly higher risk assets in the main core portfolio.