I don't see it that way.
Of course you don't. If you want to vote in a primary, simply register for it. This is not a difficult or cumbersome thing.
And a majority of the total voters agree with me, since in my state of residence the "open primary" has been voted in several times in one flavor or another and struck down by the courts.
That's cause open primaries are asinine and they violate the right of free association. You have to be pretty clueless politically to desire open primaries.
How does it help a political party in selecting its candidates to have followers of a competing party help choose?
Political parties are expressive organizations and it defies sense to have those unwilling to burden themselves with the crushing task of registering in the party decide whom the party runs for election.
SD
Ah, yes---the old "right to free association". Where, I wonder, was that "right", when Southern whites didn't want to associate with Southern blacks in restaurants???
Nope--not clueless--just independent. I came from one state that moved from a "party primary" to "open primary" (Louisiana), and moved to another state that had an "open primary" and was forced by the courts to implement a "party primary" against the wishes of the vast majority of the citizenry (Washington). The "open primary" is simply BETTER--less corruption, better candidates, and better results.