For Kelly Maynard--Melbourne Zoo, Preserving the Past

In the 1890s the Zoo began building a new kind of exhibit: they were brick, with bars across the front viewing area. A similarly-designed exhibit built in 1928 has been preserved in the Zoo’s Heritage Zone, along the main drive, so visitors can contrast that stage of the Zoo’s evolution with the modern setting they see today.
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Why can't circuses also acknowledge that mistakes have been made in the past instead of the usual tactic of making excuses for it?
If they think progressively,animal circuses have their place in the future as do zoos--Kelly Maynard

"Well said, Kelly. A mistake is not a mistake, if it only happens once. If it happens once, it is a learning tool, and not a mistake. If a mistake keeps being repeated, then it becomes a way of life, and an alibi for not making it a learning tool. A past can be preserved with pride, if it is not taken as a reflection of character, but rather an acceptance of "at the time, we just didn't know there was a different way."