Why does splatting create a tuple on the rhs but a list on the lhs?

Consider, for example,

squares = *map((2).__rpow__, range(5)),
squares
# (0, 1, 4, 9, 16)

*squares, = map((2).__rpow__, range(5))
squares
# [0, 1, 4, 9, 16]

So, all else being equal we get a list when splatting on the lhs and a tuple when splatting on the rhs.

Why?

Is this by design, and if yes, what's the rationale? Or, if not, are there any technical reasons? Or is this just how it is, no particular reason?

from Why does splatting create a tuple on the rhs but a list on the lhs?