One reason is that the state grants status and privilege on credentialed, often almost completely worthless credentials such as advanced degrees in education. The people granted these privileges tend to lean left in their political preferencs.
The huge expansion of the higher education rackets in the last couple of generations is almost entirely owing to the subsidies and incentives provided by government. Of course the beneficaries are going to prefer statist solutions.
". . . If we cannot learn wisdom from experience, it is hard to say where it is to be found."
. . . . . George Washington to Bushrod Washington, November 10, 1787, "Letter Book" copy in the Washington Papers, Library of Congress, John C. Fitzpatrick, Editor.