According to our current understanding of quantum physics, it is highly unlikely that a person can simply walk through a solid wall. Quantum physics describes the behavior of particles on a very small scale, and it introduces phenomena such as superposition and quantum tunneling. However, these effects generally apply to elementary particles and not macroscopic objects like humans.
Quantum tunneling, for example, allows particles to pass through barriers that would be classically impenetrable. But this phenomenon is primarily observed at the scale of individual particles or atoms. For larger objects, such as a person, the probability of tunneling through a solid wall is essentially zero due to the enormous number of particles involved and the high energy barriers that exist.
In the macroscopic world, the interactions between atoms and molecules in solid objects are governed by electromagnetic forces, which prevent objects from easily passing through each other. These forces result in the perception of solid objects and the inability of humans to pass through walls in everyday life.
It's important to note that our understanding of quantum physics is still evolving, and there may be discoveries in the future that could potentially challenge our current knowledge. However, based on the present understanding, walking through a wall as a result of quantum effects is not considered feasible for macroscopic objects like humans.