But, unlike the dire predictions of so many barking moonbats, I've not been reduced to living in a scratched out hole in the ground and wearing soggy cardboard boxes because I ruined... RUINED!!!! my fiscal life by paying a few dollars of interest every month.
You make good money. You are established in your career and home. You have significant savings. The only person that you have obligations to is your dog. You are in a position to make lots and lots of suboptimal or necessary but expensive decisions without really suffering significant consequences.
The fact that you regularly carry a balance and thrive is not an argument that carrying a balance is actually a positive thing. It is not even an argument that it is actually the best way for you to handle those financial decisions. It is simply a recognition that in your position at this point in your life, the expense of using a credit card in the way you do is not a drastic impact on your standard of living. You wouldn’t hurt too much if you used $1 bills to start your pellet stove, which doesn’t make it a good financial option or something to recommend to others.
I doubt that it is true that credit cards were the only option to treat Seren, however they were undoubtably the most convenient option. In your position there is no shame in paying for that convenience, any more than you should feel shame in paying a professional to do work around the house that earlier in your life you could and would have done yourself.
No one giving the very sound, general advice to avoid paying the extortionate credit card interest rates is saying that someone with your level of wealth is going to the poorhouse the first time you do so.
Those “barking moonbats” recommending to avoid carrying a balance on credit cards are not making a personal attack on you, and it remains excellent advice to people who are in a more precarious financial position than you.