Liberalism (classic liberalism) did a whole lot more than that! It freed people from serfdom and indenture, it freed them to think for themselves, and to live according to their own lights. It allowed freedom from the imposition of religion (and yes, religions did keep track of who was at church or temple or mosque and who wasn't, and imposed sanctions on them for not attending). It allowed women to own their own property, vote and hold office, and eventually it even accepted people previously sidelined, like LGBTQ+ folks, or free-thinkers and atheists.
Liberalism swept away monarchies (or at least removed their power, leaving nothing but symbolism) in favour of more representative forms of government, leading eventually to the abolition of slavery and, later, rights for working men and women, education for all -- and, yes, universal human rights and freedoms.
You don't think those things are "useful" to the common person?