It was an example to show why someone would use a CD. It’s clear you had zero intention on learning why someone would use the instrument. Honestly you probably already knew why they’re used and just wanted to push your HYSA strategy which I completely agree with. There’s no reason to ask the question in the first place
You are more right with your third sentence. I asked the question because context matters to give good advice I don’t know anything about OP’s personal life or what their goal is. There could be a few reasons why they would use CDs but you’d never know with the lack of information given hence why I asked “Why CDs”