Peeling onions, cutting potatoes.
Prep cooks split squash, cut watermelon, peel fruit (melons, pineapple, etc)
Now, the cooks, thats a different story, and they usually have their own knives for fine cuts and meat prep.
In other words, horses for courses.
The Ikea knife isn't all that bad for the money: A rigid blade that doesn't flex or squirm (important when splitting or peeling squash), comfortable handles, and easy to sharpen.
One caveat about any mnfctr. that...