If patents are in any way good (bullshit, but assume true for now) then I'm ok with this. Why can one person own imaginary property and another cannot? If Amazo

If patents are in any way good (bullshit, but assume true for now) then I'm ok with this. Why can one person own imaginary property and another cannot? If Amazon can one-click some bullshit, why cannot someone else have exclusive rights to another idea?