In our backyard we used to have a beautiful lime tree.
One day I noticed that a thorny vine of some kind had started growing around it. It looked enough like the rest of the tree that I figured it was just another stage of growth. A quick Google search told me thorns often grow around citrus trees, so I didn’t think much more about it.
Then, within a couple of months, the thorns took over the tree and it began to die. A gardener looked at it and said these particular thorns weren’t part of the tree at all. It turns out they were a foreign invader.
Had the foreign invader looked more foreign, I would have realized the need to uproot it immediately. But because it shared surface-level similarities with the tree, I was fooled into thinking it was all the same thing