Its basically the same topic as aces having sex for whatever reason.
Some aro people who date perhaps like the physical affection, perhaps the attention, the sex, the emotional intimacy, etc. An aromantic person is fully capable of performing to the standards of romance (I have done so myself), but perhaps has to remind themselves how to act around their person. I'd consider a cupioromantic person still aro (or greyro), the same way as for example lesbian who does full service sex work and has male clients is still a lesbian.
If you are not romance repulsed, it does not distess you in any way, and your partner is cool with you not having romantic feelings for them, then why not?