I used to feel this way. Then I started dating someone who, while otherwise reasonably successful and intelligent, had a house filled with incorrectly-assembled Ikea furniture.
I think some people just have a mental block when it comes to this type of activity. Imagining how two parts will fit together in the physical world or perceiving an order of operations to assembly, even if laid out in an easily parsed instruction booklet, just causes their brain to disengage for some reason.
Then again, I used to work in a retail position where I assembled so many things with far inferior construction and instructions. All in a day's work.
OTOH when people kitbash or modify Ikea furniture, I think that extends a bit into DIY. But putting it together out if the box doesn't count IMO.