I cannot fathom a Catholic making such a deplorable statement, alleging it as fact. As I read your post, I sense that this one of those “made up” explanations that “some” people assumed. Anyone who needs an explanation can read the authorization in Canon Law.
Can. 230 §2. Lay persons can fulfill the function of lector in liturgical actions by temporary designation. All lay persons can also perform the functions of commentator or cantor, or other functions, according to the norm of law.
§3. When the need of the Church warrants it and ministers are lacking, lay persons, even if they are not lectors or acolytes, can also supply certain of their duties, namely, to exercise the ministry of the word, to preside offer liturgical prayers, to confer baptism, and to distribute Holy Communion, according to the prescripts of the law.