A persons desire to have a child, will never trump another persons desire to not have a child.
That you can "see why" some women intentionally get pregnant against their partners wishes is shocking and disgusting. Wanting another child or not wanting to miss her chance to be a mother, does not make it in any way acceptable to get pregnant by deception. She ALWAYS has the option of leaving the man who does not want a(nother) child, and finding a partner who does, or going the sperm donor option alone.
Wanting more children but wanting them to have the same father when he doesn't want more kids, or loving the man she is with and wanting the baby to be his hoping he'll stay after she "accidentally" gets pregnant when he desires to be childfree, or not wanting a donor father because then there's nobody to go after for financial support, are all 100% trapping the man.
Can't you see the emotional effect having an unwanted baby has on any person, regardless of their Gender? Quite rightly women should have the legal right to terminate an unwanted pregnancy, but men don't get the right to choose to end a pregnancy that they don't want, as it isn't happening inside their body. "He can just walk away" is bullshit, he will be forever mentally affected by the fact he has created a life, and theres the massive social stigma of abandoning your child if you don't want to be a parent. It's also a financial commitment he never wanted to have, that hes in for 18 years and affects every aspect of his life. It's not about the money supporting the child not the mother, it's about how that commitment then has a knock on effect and reduces what money he has to sustain the lifestyle he wants, which for some people who choose to be child free, is travel, which quickly becomes unaffordable when theres a child to provide for. Nobody should be allowed to effectively force someone into that position, hence "trapping" being a perfectly fitting term.
Imo in the case of accidental pregnancy, if a woman wants to proceed but the man does not, and the woman decides to continue knowing this, then it should be on the terms that the man is absolved of the legal commitment financially, as the woman is continuing the pregnancy knowing the man doesn't wish to have the child, and has the option to terminate if those conditions do not suit.
If she's intentionally gotten pregnant by lying about being on contraception, how is that any different to a man "stealthing" by taking a condom off mid sex? Stealthing is legally considered rape, because the consent was only given for protected sex. So, a woman lying about being on contraception to obtain unprotected sex by deception makes it sexual assault (since rape specifically requires the perpatrator to use a penis) making the women that do it abhorrent sex offenders.
How can you possibly "see why" someone intentionally commits sexual assault and think it's in any way understandable?!