Many women cannot climax from penetration alone. While ideally the husband would use oral or manual stimulation to help her achieve it, sometimes a couple just wants a quickie or a woman needs something a little extra to climax. I don’t see that as a big deal. Unless toys are some sort of fetish or unless the husband always refuses to try to get her to climax on his own I don’t think they’re a problem.
I agree with you. But I think a couple needs to exercise caution about using them. Not that the couple in the OP wouldn’t, necessarily, but sometimes hearing “there’s nothing specific about them” can lead a person to think they can “do no wrong.” I think toys introduce a much higher likelihood of looking at sex in the wrong way.
Think about all of the threads we get here asking about married sex. One party is acting like it’s his or her right to it whenever, wherever, however, and after all they waited until marriage, so now the other spouse needs to get with the program. Or it’s the spouse who’s withholding because the other won’t do whatever, and so sex is used as a weapon. When sex does happen for these couples, it may always end with part A in part B, but it’s still not holy sex, as the Church sees it.
Couples should ask themselves if they are objectifying each other by their actions - both in and out of the bedroom. Some couples may be able to use toys in an OK way, and others may not. There are things that my husband and I don’t do because we know it’s not OK for me, him, or both of us. These things may be OK for other couples. We may have things we do that another couple can’t, for whatever reason.
And they can always try them (or continue to use them) and later change their mind. Or maybe they think there’s a reason they shouldn’t now, and later decide it would be a nice change. I think there’s plenty else that can be done, but that’s based on me and my marriage.
TL; DR: So yeah, toys can be OK. But if they aren’t helping you have holy sex, or are preventing that, then ditch 'em.