If all these people are worthy of pardons, doesn’t that mean the justice system is fundamentally flawed? How can it be that Presidential pardons are correcting

If all these people are worthy of pardons, doesn’t that mean the justice system is fundamentally flawed? How can it be that Presidential pardons are correcting miscarriages of justice? And if these cases deserve reversals of miscarriage of justice, then doesn’t that mean that all over the USA thousands and thousands of other people deserve the same?