I don't believe TTE screenshots actually broke the Gallery search system - per other threads, that seems to have happened during an attempted hardware/database upgrade. The TTE content may have been part of the volume motivating that attempt, but blaming it for the fiasco seems to me a bit harsh.
Speaking for myself alone, I'm a bit bemused by the prevalence of TTE material in the Gallery, but I'm not a TTE fan. Even so, I suspect there is not as much of it as we think: it's instantly recognizable (from the bright colors, faces, and proportions), so it seems to be everywhere when, probably, it really isn't. Perhaps there are some TTE fans who fan the screenshot button like a cowboy sixgun, but the instant recognition of their content (by the rest of us) makes it easy to swiftly pass it by. Maybe, since we don't understand the attraction, with a little sigh.