for reasons unknown

This has been bugging me for a while now and i suddenly have the urge to get it off my chest-

The emphasis placed on the need to reason everything, more particularly, with respect to art.

I m so sick of reasons, so sick of logic. Reasons are of course paramount to a whole lot of things, say 70 or 80% of the time? But what i cannot swallow is when lecturers ask us to explain every single tiny detail or motive behind our work. This may sound absurd as it is only deemed normal and right that they probe into our innerworkings. But what i cannot fathom is why it is unacceptable, atrocious even if we cannot produce a valid concrete reason with regards to art- Art is abstract,ideas come as swiftly as they go, moments of genius occur sporadically and our imagination is only as wondrous and unpredictable as the wind.
Hence, it is impossible that we validify or account for every line or choice of colour or composition we employ, which they often like to ask. For to do so would be to defeat the purpose of the art piece, which is to transcend what words cannot and hence should speak for itself.
This is not to say you can blindly produce crap work of course but to delve into the exacts and reasons behind every detail would be to kill the beauty in the process. No?
Afterall, grey areas are often where the magic happens.

Something else i have been thinking about-
So, say for instance someone gets a tattoo and so logically and naturally you'd ask why that design. And if that person just goes "oh, because i like it.", providing no real significant reason behind it, you'd just go "Right..." and think of that person as being somewhat superficial and getting it simply for the sake of getting it. But instead, i feel that not everything needs to be justified or accounted for. Its as simple as just liking the motif or image, none of that complicated history or heart wrenching background story as portrayed in those shows nowadays.

Okay, this may sound like i am defending myself if in future i do get one of those seemingly nonsensical things inked, but trust me, i really do feel this way.