It's important because in a person's life, there will be things that are risky (hard).
There will be options in your life that you will need to make. There also things you may need to be aware of, so not every time you may be lucky.
Cal·o·type
/ˈkaləˌtīp/
an early photographic process in which negatives were made using paper coated with silver iodide.
PROCESS ;
Calotype, also called talbotype, early photographic technique invented by William Henry Fox Talbot of Great Britain in the 1830s. In this technique, a sheet of paper coated with silver chloride was exposed to light in a camera obscura; those areas hit by light became dark in tone, yielding a negative image.