No, they shouldn’t, because there’s a key fallacy in your argument:
The true issue in your rapist analogy isn’t the fact that someone got pregnant. The true issue is that of one person, the rapist, trying to control the decisions and autonomy of another person’s body.... exactly like that of a cis man trying to decide the fate of a fetus in another person’s body.

Bodily autonomy isn’t taken away from criminals. There are discussions to be had about male rape victims, rape culture, and the flaws of the justice system, but trying to factor forced abortion as a viable option is a derailing strawman that does both issues, abortion and male rape, a disservice.