Or refusing to put her phone down at 2am on a school night, or refusing to stop seeing a 35 year old man? Or for getting a tattoo, or taking drugs, or running away and refusing to come home?
It is illegal to tattoo an under-18. Taking drugs is illegal. Having a sexual relationship with a 35-year-old is illegal on the 35-year-old's part. Refusing to put her phone down at 2am on a school night is a bit daft but nothing hugely damaging. While it's illegal to have sex under the age of 14, unless you've put a chastity belt on them it's a case of closing the stable door after the horse has bolted.
There is technically no law preventing a 14 year old girl from continuing with her pregnancy, so it's very different to stopping them from getting a tattoo/doing drugs/being groomed by a 35-year-old. I think abortion is something that can't be conflated with simple common sense mistakes every teenager makes like staying up on their phone until stupid o'clock because it involves a procedure on their body.
For me, I'm pro choice of the "as early as possible, as late as necessary" variety, and I think pressuring a 14-year-old to have an abortion is unacceptable. Saying "If my daughter got pregnant young, she WOULD have an abortion" piles an unfair amount of pressure onto young shoulders; perhaps they have different views on abortion? If it happened, they may feel very differently.
I insisted that if I got pregnant under 25, I'd have an abortion. Once I was actually pregnant it was a very different story. My parents tried to persuade me to have an abortion and it nearly destroyed our relationship. At a time when I needed support and reassurance, all I had was pressure. I was 5 years older than these hypothetical pregnant 14-year-olds and it made an already-terrifying time so much more stressful, so I worry about how they'd feel, once the abortion is done and dusted and they need support, if they feel that the pressure has damaged their relationship with their parents.
For some girls, it will be the obvious choice, and once it's over and done with they can move on and they'll be grateful for the encouragement, but for some it might not be and it isn't possible to know who will react in what way until it actually happens.
If my DD was pregnant at 14, I'd hope she was already aware of the options - in a recent young mums chat we discussed the changes to SRE in schools and we all felt that pregnancy choices should be discussed in PSHE/SRE lessons as standard - but I'd present all the options to her, equip her with the information and support her in the choice she made. Others would do differently, that's fine, but for those who seemed incredulous that people wouldn't tell their daughter to have an abortion, this is my reasoning.