I'm assuming that this tool is for people who aren't familiar with the system enough to get what they need from the man pages and would rather not invest the time to become deeper on it.
If you don't remember the command you need to use, how can you be sure it is the correct command and options before you run it?
edit: typo
On the other hand if you are doing something dangerous or risky or you don't understand the suggested command, maybe you shouldn't use this tool without searching more info first.
That sounds suspciously like smitty[0].
Which was a useful tool when I was learning AIX. I'd expect a similar tool could be useful for learning other systems too.
Only a fool would rely solely a tool like this to run things you don't understand.
That doesn't make it a dangerous tool to use though.
It asks you for confirmation before running it.
sudo rm -rf /