Not true. Lets see what those "cheap" devices provide in terms of privacy:
1. During installation Windows 10 explicitly asks you what stuff you want to enable and how those affect your privacy
2. Microsoft Edge supports ad blockers and anti-trackers on desktop, mobile version is coming (already here in fast-ring?)
3. Google allows you to turn off all kind of analytics. They email you once a year and ask you to check your security and privacy settings.
4. Chrome allows you to install ad-blockers from Googles own extension store
5. On Android you also have the choice of installing Mozilla firefox which supports desktop-grade adblocker and anti-tracker extensions. Android being android you can make it the default OS browser and disable or remove Chrome completely.
6. On Android you can also install Mozilla Focus which is a privacy-oriented browser
You are basically spreading FUD.