Can't believe I'm dignifying this with a reply, as I suspect you're on a wind up anyway, but they were a band that didn't release singles as was quite prevalent for rock bands of the time. If they didn't release this so called one hit wonder as a single it wouldn't have made one iota of difference to their fame and success or diminish their album buying fan base.
Not what I would call a one hit wonder at all.
It's not like it was 'Layla' by that band no-one ever heard of again. Who were they?, 'Derek and the Dominicans' or something.