For any form of information exchange to take place there must be a medium (even a vacuum or the quantum foam) and some energy. Energy moves. Proximity is important because of attenuation (signal degradation) in most mediums. Proximity is important because it allows one to observe and learn about another with less attenuation. Proximity is important because more signals can generally be sent in a shorter space of time between two entities. This promotes understanding, empathy and entrainment between two or more beings.
There are vibrations made by each entity in the act of thinking, breathing, moving or just being. Air is exchanged. Energy is given, drawn or shared. Gravity exists between any two things with mass. With proximity to another there is no substitute for full spectrum engagement enhanced further by presence and awareness.
Technology is a wonderful bridge however... the smell of your hair in the morning, the taste of your skin, the specific momentary look of insecurity followed by a rush of endorphins that cause your nostrils to flare and the hair to stand up on your neck and arms, the timbre of your voice in the quiet of the night and the oneness of form when interlocked in the throes of passion... this all degrades with distance and the co-evolution fades further away irrespective of the initial strength of the connection. Proximity is mindshare and heartshare whether you like it or not. Trajectories must converge regularly enough to enable long term cohesion. From the smallest cluster of two to the largest cohesive tribes, we share signals and synchronise... the strongest signals literally come from the closest.
If one was to introduce quantum holism/non-separability and the spiritual realm in to the debate I would not disagree but would point out that the cultivation of personal depth and the subtlety required to access these mediums are not readily accessible to everyone though we may feel the effects or notice them at different times in our lives.