I always ask such people to describe the ethics of a “right” that obligates the service of a second party.
I’ve never had a leftard address that question directly.
Basic human rights - individual rights, more properly - are notable in that they do not ordinarily require someone else to perform, in the exercise of those rights. Free speech. Freedom of worship. (1st Amendment) Self-defense (2nd Amendment).
Once the unscrupulous start opining on what people have a “right” to - so-called free medical care, or free food, free rent, whatever, then we aren’t talking about basic human or individual rights, for precisely the reason you describe.
Doctors (for example) don’t go to medical school for free, necessarily. They don’t work for free. And they shouldn’t be forced to work for free. We (The Republicans, in 1865 anyway) outlawed Slavery. I guess the leftists are still pissed off about that.
The problem with leftist and their philosophies is an inherent flaw in their understanding of human behavior. Technology changes, human nature does not. It is a worldview ultimately designed to tear down family and society, in order that they can obtain total power. Some of its adherents might mean well, but they are pawns.
The only method for us to collectively thrive is by a rigid and unyielding protection of individual rights. Individual rights are practically alien throughout history, and around the world today.
They must be bundled with private property rights, presumption of innocence, equality under the law, rule of law, etc.
Everything that makes individuals, or societies, or businesses, etc is under vicious unyielding attack whenever possible. This is not a coincidence.