Abortion involves another party, which makes it not a personal choice by definition.
Conservatives couldn't care less what other people do with regards to contraception, homosexuality, etc. We just don't want to be forced by the rule of law to pay for or otherwise support those activities. I'm pretty sure you would get plenty mad if we proposed a tax to help people buy guns who couldn't afford them. In other words, we're not trying to restrict your personal freedom, we're insisting on personal responsibility in addition to your freedom. You can't truly have one without the other.