I agree anyone with their heart set should proceed. But I think many women who are parents and have been through it, unless for religious or other pro life reasons, would not wish their 19 year old daughter to proceed.
the op and her boyfriend cannot home themselves. They are unlikely to have 1000-1500 a month child care costs, so one unlikely to be able to work. As much as she’s saying she won’t , they will likely have to rely on parental support as they won’t be able to do it themselves.
her view of travelling etc is naive at this point. Babies and young kids are expensive, it’s hard work. They will lose any limited social life they do have. Maybe have their child having to sleep in their room. Be exhausted from sleepless nights, and if the child has disabilities or additional needs, then it will further change the course of their lives. New clothes, travel, even the toiletries they wish will be long gone.
in addition it’s a relatively new relationship, where at least one is a teenager.
does this mean it isn’t feasible, no. Of course not, it’s doable and can work out very well, very rewarding. Does that mean it’s easy, no. With stress, financial concerns, comes arguments and relationship difficulties. If they ultimately split, can she do it alone?
any decision needs to be made in light of full facts and not a romantic view of child rearing.