These are all subjective aspects which often confuse unfamiliarity with obfuscation.

I can read generic code in multiple languages even when I'm not fluent in these languages.

Once you get used to generic code, it actually becomes easier to read and understand than code where everything is type cast or Object typed all over the place.

Readability is far from subjective, if 50% of your devs can’t read parts of the codebase then it’s not readable.

Simple generic code is fine, but generics can be abused to over engineer things.