According to the Standard Model of particle physics, which describes the fundamental particles and their interactions, macroscopic objects are indeed considered to be effectively incapable of quantum tunneling due to their emergent properties. However, it's important to clarify the terminology and context in which this statement is made.
In quantum mechanics, particles can exhibit a phenomenon called quantum tunneling, where there is a non-zero probability for a particle to "tunnel" through an energy barrier even if it doesn't have sufficient classical energy to overcome it. This behavior arises from the wave-like nature of particles described by their wave functions.
Macroscopic objects, such as everyday objects, are composed of an extremely large number of particles (atoms and molecules) that collectively give rise to emergent classical properties, such as position, momentum, and energy. While the individual particles that make up these objects may exhibit quantum mechanical behavior, the emergent properties at the macroscopic scale are effectively described by classical physics.
In macroscopic systems, the energy barriers encountered are typically much larger than the energies associated with the constituent particles, making quantum tunneling effects negligible. The wave functions of the individual particles become highly localized and their wave nature is effectively "washed out" in the collective behavior of the system.
However, it's worth noting that there are cases where macroscopic quantum phenomena can be observed under specific conditions. For example, in superconductivity, superfluidity, or Bose-Einstein condensates, large ensembles of particles can exhibit coherent quantum behavior on a macroscopic scale. These are special states of matter where quantum effects dominate and lead to phenomena that are not easily explained within classical physics.
In summary, according to the Standard Model, macroscopic objects are effectively incapable of quantum tunneling due to the emergent classical properties that arise from a large number of constituent particles. While quantum mechanical behavior can manifest on a microscopic scale, it is typically not observed at the macroscopic scale in everyday objects.