No. Conservatives voting for RINOs because "he can win" is THE driving force in the destruction of the modern Republican Party in California. Once the primary is over, support the candidate. Else the moderates have no excuse for their usual despicable behavior. The point is tactical, not partisan.
The response implies that recent Republican primaries were open. That politcal philosophies of all stripes were allowed to compete on a level field in the party primaries, to the extent of their economic ability, allowing the party faithful wider choices to better guide the party. Theoretically this process would allow the faithful to coalesces, under the responsibilities of democracy.
That there has been no coalescences in the last California gubernatorial cycle and the last national presidential cycle speaks to the partisan triumph of the predestined primary process. A partisan watermark.
No, the problem is not poor choices, the problem is limited choices, the problem is the corruption of the process by PARTISANS.