and castration

Let’s at least start with the fact that cats don’t understand that the size of the goat and eggs is an object of pride. Therefore, even if they are offended by you, it is not because you have deprived them of their male pride, but banally for the suffering he had to experience due to the operation.
Then about the "unnatural" Keeping an animal locked in whose hormones play is also unnatural. If you live in a private house, and the cat can come and go at any time, and you wonder if it will disappear or not, do not castrate. In other cases, it is better not to do so at all.