There is no way to access the wallet without the phrase or private key. Usually, there is a notification about it there, a warning to keep the phrase or private key as the only way to access it. Hackers can access the wallet after they got the phrase or private key from the wallet owner. But the problem is, hackers can get the phrase or private key from various ways. So, we must always remember to save the phrase or private key in a secure place. Make sure hackers cannot find a way to access the place.