Important for what purpose? To check if your recovery procedure works? If for this reason, then yes, clearly it's important. It's definitely something I always do unless the wallet is small value.

You can back up wallet files before trying it, to avoid risk. 

 Yeah I will do it after I buy a new hardware device for that wallet. But my main question was that is there any possibility that I don’t recover my funds even if I enter correct seed phrase. It’s not that I never send or received payments using it.