Your theory about women wanting to get pregnant to "secure welfare" not only is false, but also won't invalidate that manipulative tactics are unisex.

By the way, that idea that women want to get pregnant to "trap" men or get welfare is quite absurd. In case you haven't noticed, birth rates are going down, precisely in the countries with access to contraception and educated women. When women can chose, birth rates go down.

Some men don't want to use a condom for the pleasure. Others because getting a woman pregnant is their way to try to control her. Others just want to become fathers.

And if you work as a counseler, the you might want to learn about reproductive coercion:

https://en.wikipedia.org/wiki/Reproductive_coercion

Which I guess go back to the original topic about manipulative tactics.