That’s just rabbinical commentary on the commandment for eunuchs not to marry.
No it is not. Jesus was not saying some men castrate themselves for God’s kingdom, which is what your interpretation implies. He was saying that some men voluntarily choose celibacy for God’s kingdom while, for others, it is NOT a choice.
Paul clearly said he had the power to have a wife. This means he was not a eunuch due to a birth defect or something that happened to him. Yet he advocated celibacy for those who could do so without falling into sexual temptation.
Peter commented on Christ’s teachings on marriage and divorce that there was a benefit to never being married. Christ responded that “not all men can receive this saying, but whoever is able to receive it, let him receive it.”
Feel free to share your own beliefs, but stop trying to be an instructor on Christian doctrine when you reject Christian doctrine.