To limit the probability that the inappropriate attachment of studs will lead to their becoming displaced, which could lead to the inappropriate attachment of studs to cladding, sheathing or interior finish materials, which could lead to an inability to resist expected lateral and gravity loads.
For assemblies that are required to provide fire resistance, this is to limit the probability of excessive movement, deformation or failure under expected loads, which could lead to compromised fire resistance of the assemblies, which could lead to harm to persons.