1. Dispute over official Apple methods to download iCloud Photos
OP claims no simple Mac button exists: "There is NO button on Mac to download photos from iCloud" - reconnecting. Many counter with Photos app: "Download Originals to this Mac" - js2, coder543; or export: "Cmd+A > File > Export Unmodified Originals" - nemothekid.
2. Workarounds via Photos app, privacy requests, and exports
Users detail enabling "Download Originals," disabling optimize storage, or accessing bundle: "After optimise storage is disabled on the Mac, wait for all photos to download. Then, open the photos library bundle" - possiblerobot. Privacy.apple.com for archives: "users of the European Union can get a full export" - reddalo (works globally per catskull).
3. Endorsement of third-party/self-hosted tools for backups
Praise for icloudpd, osxphotos, Immich/Ente: "Iβve been using this for several years... to download new photos nightly" - Dachande663; "Immich is probably the best option" - dwayne_dibley. Concerns over ADP, lock-in: "Apple doesn't want you to leave" - cdrnsf.