You get what you pay for, but not all their plastics are like that. For example, the few plastic parts used in the kitchens are quality plastics where needed. The metal used is the same, with some Blum parts and the material the cabinets are made out of is quite substantial.
Obviously they make compromises to meet a price point, so given the price points of these products I believe they well lean heavily to the Ikea quality rather than Legos quality.
I would almost say if people have kids it’s maybe an option since they’d grow out of it, but then engineered wood would have lots of chemicals in them.