I think it’s just that we’re possessive/protective of “our” code, even more so if one is passionate about programming. We’ve put a lot of effort into it, then somebody else comes along and “ruins” our “perfect” (to our eyes) formatting/styling!
I felt that. I have a colleague whose coding style is different to mine and whenever they work on code that I originally wrote, I have to resist the temptation to modify things to camelCase.
As the senior dev, please don’t.