A company may have no qualified enough staff at the moment when a complicated development task arises.
Still, even once you find and hire the necessary experts, they are not an effective team yet.
You have to integrate them into your company’s environment before expecting any results.
Moreover, even then how can you be sure they will bring you exactly what you want?
This is what we do: deal with complicated tasks, deliver quality and timely results and take responsibility for them.