Echoing what CRF250Xpert
just stated, skills are acquired with training and practice. As long as there's no Scope of Practice barrier, nurses who are not APN's could be taught many skills as easily as APN's. In the same vein, APN's can perform skills physicians routinely perform as long there is nothing stated in the Practice Acts prohibiting it.
NP's typically perform skills based on the type of practice they're involved in...i.e., primary care NP's would likely be doing office based procedures such as joint injections, simple suturing, extremity splinting; NP's working in Thoracic Surgery would likely be placing chest tubes; and Critical Care NP's like myself have been placing central lines, arterial lines, intubating, and providing conscious sedation.
To me, the bigger picture is that NP training focuses on being a provider who diagnoses and acts on the diagnosis using these skills while at the same time weighing the risk and benefits of the procedure itself. For example, various types of chest tube placements can easily be learned from simply doing a thoracentesis to placing large French, rigid chest tubes. The decision to choose one over the other requires training in diagnostics and clinical decision-making you wouldn't have if you didn't attend an NP program (or PA and MD+residency for that matter).