I'm not really sure where this is coming from, but really any sensible UX person will say "good UX is requiring the least out of users to allow them to achieve

I'm not really sure where this is coming from, but really any sensible UX person will say "good UX is requiring the least out of users to allow them to achieve their goals while having enough to deliver your business objectives" and not "less is better". Obviously there is no perfect balance for any market and bloat is a completely subjective value to tag on to anything. Bloated in relation to what? In what context? For a site that sold £1000 shoes Amazon's UX principles would be a crazy strategy to implement, but if you apply the same idea visa-versa I imagine that Amazon would be able to measure lost revenue in the tens of millions. But there will be an underlying essential UX requirement because both sites are based on the principle that people have actively chosen to look for an item, and by making that decision they are, more than likely, willing to put up with more than, say, someone looking around a support site for help with their printer drivers.