I've honestly found that it's willful ignorance in most cases. Especially if someone else is there to do it for them, these types would rather just pretend they're incapable than put in any amount of effort. I've seen people throw their hands up and state "I can't do it" even if it's something they've done many times before if just one thing is different. They come in with the mindset that "I don't know how works" and refuse to learn, even when being taught. I found it also applies to other things, though technology is most common. Unless people want to actually learn, they'll refuse to take any info in. It just reminds me of a time I had someone tell me "I don't know what that is though!" as I was explaining to them literally what it was.