Questions

• What is the difference between the rm -d and rm -R commands in Bash?
• Which one should I use?

Details

According to the man page for the rm command:

• rm -d attempts to remove directories as well as other types of files.
• rm -R attempts to remove the file hierarchy rooted in each file argument. The -R option implies the -d option.

Now, I am aware of that last statement (-R implies -d), which may seem to answer my question. However, I still wonder why both command flags exist in the first place, if they are supposedly identical in what they do.

Furthermore, because I am still in the process of learning Bash, I think it's good to know which option is the preferred choice among Bash programmers (conventionally), and why.