I think there might be another source of this stupid notion. Universities host free clinics where current students can practice their specialties on volunteer patients, who usually are from underserved communities and/or undocumented, who cannot get medical attention any other way. So of course, this is the “free healthcare for illegals”, dramatically exagerrated… Ignoring the fact that it is provided by less-experienced students, at very low capacity, and is technically available to anyone.