Check this.Why would I want to be spied on? Don't enslave my Windows devices to Microsoft either and yet they don't force cloud device check. Here are screenshots after reinstalling MacOS showing disabled iCloud, Find My Mac and File Fault. It's like a nosy neighbor that checks on your house when you never asked and specifically tell not to.
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See if thats disabled first before removing and reinstalling macOS. I tested with turned Activation lock off in system report and it did not ask for activation lock password when reinstalling macOS.