Earlier quoted context omitted.
But surely your raw materials will be significantly higher quality? Well-made furniture lasts for generations. IKEA is a consumable.
Not necessarily in ways that matter. If I use equivalent materials (MDF), it's still more expensive for me. If I use good plywood (which is usually the right choice) or solid wood (which despite common perception is the wrong choice for almost anything involving large flat panels), it may be more durable but becomes significantly more expensive. IKEA stuff may not last centuries, but it often lasts fine for its inten…
This is not at all a common or majority opinion among the fine woodworking community. There certainly are advantages to engineered wood products, but the shortcomings of wood as an organic material (it moves with respect to humidity, regardless of what you coat it with) can be overcome through successful furniture design.
Also, IKEA is not the comparison for my DIY projects. I compare quite favorably in cost to Thomas Moser, West Elm, etc.