I don't think your understanding is accurate. Their positions are overwhelmingly in support of freedom of information, freedom of speech, privacy, and the public domain. They're opposed to anything that locks down and restricts information, generally oppose unnecessary copyright extension and overbearing copyright laws and rules (including the DMCA and DRM). They have a wide array of positions that are both frequently aligned with and opposed by both major American political parties.

People distort the ALA's position as pushing LGBTQ books on children, but that's just the most in the limelight right now because those are the books that are being challenged the most, and the ALA is generally against book banning.

The ALA is aligned largely with classical liberalism, not modern progressivism, and most American conservatives I knew before 2016 would have agreed with their positions on freedom of information and personal privacy.