When preparing an article, you cannot change geographical names, species names and especially similar words in methodology. Can you share your thoughts on this issue?
A formal automated estimate of the index should be assessed and commented by a human expert. Similarity of 10-15% may be quite usual, especially due to reference lists, commonly referred papers. Extensive bibliographies produce high similarity.
Result of tradition, then risk analysis and finally skin in the game: https://www.researchgate.net/publication/380427514_Kalergi_and_Hart-Cellerand_Memetics_White_Antifragility