When you're mounting something the important thing is that the stress is distributed across the mounts in a way that means no single component is receiving more

When you're mounting something the important thing is that the stress is distributed across the mounts in a way that means no single component is receiving more weight than it can take. Using lots and lots of 'weak' mounts like staples is just as secure as using eight bolts, but in the case of the staples the load is distributed across more of the wall. If the wall itself is the weak point then that's more secure.