When both sides of a bed have similar side tables and matching lamps, the whole setup looks intentional and calm. It gives a sense of balance, even if the rest of the room is quite simple. Your eye reads symmetry as tidy and restful, which suits a bedroom well.
Practically, it’s fair too—both people get their own light and surface. You don’t have one person stuck in the dark while the other has everything. Even in a single-person room, two lamps can frame the bed nicely and offer flexible lighting: both on when you’re reading a lot, one on for softer mood.
You don’t need expensive designer lamps; just similar shapes and heights make a big difference.
