Would you agree that adult women who prey upon boys sexually are not the most mentally balanced people to be introducing boys to sex with females? There is a huge power difference in these relationships that put boys at the mercy of the adult female. If the experience is dark, would this effect a boy's sexual imprinting and result in him not being comfortable or real with normal women sexually? But we agree that being molested by a female adult versus a male adult are totally different animals in consequence for the psychology boys.
One of the major problems I see for boys and girls today is that they are not socialized to understand that sex exists within a larger inspiration called love and caring. Sex can be a mechanical process of sexual expression but that kind of sex (I call it head sex - masturbation with or without another person involved) is different from real sex that involves, touches and entwines the spirit or soul of a male and a female. One produces physical satisfaction and the other produces physical satisfaction combined with an explosion of love known only to humans. It's a blessed thing that is really hard to put in secular terms but all young people should know that it exists. It is like trying to explain to people what it is like when the Holy Spirit embraces you.
I’m not disagreeing with you. Adult female seducers of teenage boys do harm them, compared to the ideal ways to be introduced to heterosexual love and sex.
But at the end of the day, the boys are still on a heterosexual trajectory, with no confusion of their sexual identity.
IMHO the harm is orders of magnitude less than in the case of a sodomite pederast.