I think you're reading something that's not there. I've owned a couple of SX basses over the years. They would be my "spare" bass that I brought to gigs in case something happened to my main bass. They were adequate, which means "satisfactory or acceptable in quality." There is a bias on TB that if you don't say something is fantastic, or great, then you are slamming it. I guess I just don't get people that are desperate to elevate a bass beyond what it is.
I think you might be reading a bit more into it than is there as well. I think it's more that some people are just delighted to find something that punches well above it's weight for the price and they get enthusiastic about it. I don't detect any desperation there. People who play inexpensive gear rarely have any illusions they're impressing anybody with it. Which is not the case with many of the high end gear players I've run into over the years who seek affirmation for what they use and bristle whenever someone suggests that maybe their $5K JB type bass isn't all it's cracked up to be in any significant way. So what I guess I don't get are people who so identify with their material possessions that they interpret any critique of them as a personal attack on themselves. As in: Love me? Then love my gear. Not saying that's you. But there are plenty enough like that out there that some people will push back when they suspect that's who they're dealing with.
And shifting gears for a moment, where's the opportunity for unexpected delight with high end stuff? I mean if you bought something like a Fodera or (my fav) a Wal, and find it's an utter joy to own and play, is there any real surprise there? My feeling is: Wow! Sounds great. Good to know the five digits I plunked down actually got me something. Or as one Wal player replied when I complimented him on the tone of his Wal: "Thanks! It damn well better for what they charge you for one."
As far as "beyond what it is" goes, who gets to make that call? My feeling is the person who actually plays one more than anybody else. Most of the heavy knocks I see on most inexpensive things here don't offer anything concrete to support their "what it is" characterization. Instead they offer short drive-be snipes like "Well...if you appreciate quality..." - or "Once you try a real <fill in the blank> PM me and tell me you feel the same way about it." -or- "Well...if it's good enough for you..." and similar. Which basically boils down to: "You don't know what you're talking about, plus you have no taste - however, unlike you, I do!"
But whatever. I still think as far as the above videos went, the HB sounded better. To me. And in some respects that's all that really matters. What sounds good to each of us individually.