Foxies
Not have much time to answer(and even less to have exchanges of several posts with arguments and counter arguments,even if it would be interesting),but I can easily think of counter-arguments that my parents would say to almost all the ones you used...
But,is it relevant for people who can stop it when they want if they accept the consequences?I can stop to wear it,only by telling them to give me my keys.But they would remind me they can decide I should take care of myself,including financially and housing(even if they may act a bit differently during the pandemic,but not sure),and they may decide to not have contact with me anymore(at least until I agree to wear it again or get married).It sounds awful,but except for the last part,it would be the case too,without anything related to chastity,if someone has to leave to another town for his/her studies,and the parents could not afford the rent or costs of the study(the case for many students,which makes the increased difficulty to have a student job presently very hard to manage)...
Jen the example conversation is too difficult I couldn't get through it with them. All the points you have to try and make them see reason they would twist around to show their reasons.
And,even if you plan it well,if they don't use the counter-arguments you thought they would use,you would have to be able to find another arguments,adapted to the talk,very quickly,which can be difficult.
Foxies
Some people come not frequently,maybe they would have more answer to post.