If we want to store and display a musicians work on the soundtrack to a game, that wasn't released separately but is nonetheless music that's available to enjoy in-game, it seems incorrect to assert that that release that the musician worked on and was paid for is a bootleg release.
I would welcome some way to measure, without going into detail, what else is on those releases, just like we do with [data track]. But I don't think that's a reason to label it a bootleg.
Not to shoot myself in the foot here, but the really prickly question for me would be where to draw the line, do we start adding movies because they contain music you can listen to?
But in the case of game music there seems to be a need for a stable source of information, eg art and release dates, which is best taken from something acknowledged as an 'official' release, and rips can be organised below that.
That just makes sense to me. That said, it doesn't bother me that much. The main problem is how we display (eg don't display) bootlegs and promos at this point, which are very inaccessible and almost impossible for new users to find. Once that's inevitably addressed it becomes an issue of semantics anyway.