safety – Is there a very good intend behind the scripting system bitcoin makes use of for transactions?

From https://en.bitcoin.it/wiki/Script :
“Scripting offers the flexibleness to alter the parameters of what is wanted to spend transferred Bitcoins. For instance, the scripting system may very well be used to require two personal keys, or a mix of a number of keys, and even no keys in any respect.”

I am questioning if there’s a “good” purpose to supply that “flexibility”. Foremost why is there a chance to ask for “no keys in any respect”?

I need to apologize if I am misunderstanding one thing right here or if I am unaware or naive and for my dangerous english.

From https://en.bitcoin.it/wiki/Script :
“Scripting offers the flexibleness to alter the parameters of what is wanted to spend transferred Bitcoins. For instance, the scripting system may very well be used to require two personal keys, or a mix of a number of keys, and even no keys in any respect.”

I am questioning if there’s a “good” purpose to supply that “flexibility”. Foremost why is there a chance to ask for “no keys in any respect”?

I need to apologize if I am misunderstanding one thing right here or if I am unaware or naive and for my dangerous english.