What is the purpose of access modifiers if they can be bypassed with reflection?

I understand that using access modifiers is an important practice when writing Java (or most) code, but isn't it effectively made redundant by the fact that you can bypass these modifiers using reflection?

For example, if I want to protect my objects sensitive variables by setting them to private and providing accessor methods, someone can still easily come in and bypass this using reflection, and potentially set unsafe values. Why does Java provide access modifiers, and then a tool to bypass them? It seems it would just be easier to not use either.