Yes, I see the decision to release on vinyl as an aesthetic decision as well. Release on cassette as well, as much as any other medium.
My basic premise is that 99% of all recordings today are done digitally, so release on cd or download is pretty much only a 1:1 duplicate of the original file with next to no restrictions (there may be a change of bit-depth or similar, but only very limited influence on frequency range, dynamics, phase...). So whatever the artist can create can be released.
However, vinyl may be a little more demanding on how the material in question has to be prepared, as the process of vinyl duplication is more complex (including a certain human factor as the cutter etc.) and there are more technical-restrictions as well. So in the case of vinyl, there is more of a direct influence of the medium back to the creation of the original material (which may be executed in post-production).