What are the merit and demerit of simple random?

The merit of simple random sampling is that it ensures every individual in the population has an equal chance of being selected, which helps eliminate bias and supports the generalizability of results. However, a significant demerit is that it can be impractical or costly, especially for large populations, as it often requires a complete list of the population and can lead to underrepresentation of smaller subgroups. Additionally, random sampling may not always capture the diversity of the population, potentially skewing results.