In the back of my mind I always thought fructose might be ok because it's natural and we are 'meant to eat it', but from what you say it seems that may not be the case. Hope NT is ok.
Yes, we're meant to eat it, in that we are omnivores and hence eat fruit, but I guess our diets are so abnormal now that even 'natural' foods can be too much, coming on top of the unnatural stuff. Also, fruit juice is a very concentrated form of the sugar, without the bulk and fibre of whole fruit, so we might tend to drink much more of it than we would eat in whole fruit.... (Which is why you can't claim 5 glasses of juice as your five a day).
Plus in the gout situation, it can come on top of a lot of other foodstuffs (and some medication) which are considered healthy, but contain certain chemicals, a build up of which causes the gout. The 'good' stuff just tips the build up into critical mass, so to speak.