That’s a ludicrous argument. The 7 days of the week come from God. What we call the names in English (and other local languages) is irrelevant.
It’s like saying Easter is pagan because of the English name, while almost the rest of the Catholic world calls Easter the local language translation of “Passover.”
Thursday in Spanish is: jueves That does NOT come from Thor, it actually comes from Jupiter’s Day. As does the Latin.
In Hebrew, the name of Thursday (written in Latin letters) is “Yom Chamishi” which means Fifth Day.
israelhebrew.com/days-of-the-week-in-hebrew/
In Greek, Thursday is called (in Latin letters) “hemera Dios,” which means Zeus’s Day.
The names of the days of the week are arbitrary and dependent on the local language. As part of Evangelization, the Church NEVER required people to change the names of the days of the week on this native languages. The Church required a conversion of individual peoples, not a conversion and re-write of local language.
This is just one of the reasons why it bothers me when people want to change A.D. to C.E.
God Bless