I’m not IC, but I suffer from IBS, and I often wear diapers just for my peace of mind. Years ago, I used public transportation to work, and I was stuck without a toilet for more than an hour some days. Sometimes I panicked all the way home that I was going to have an accident. It was once so bad that I couldn't get home in time and I actually pooped my pants as I opened the front door. After that, I started putting on diapers in the bathroom at work for the way home. It was very nice to be able to enjoy the journey home without worrying about messing myself.
I don't commute anymore, but I still wear diapers when my IBS is bothering me and I have to leave the house and I won't have easy access to a toilet. I've only had a few IBS accidents in my diapers, but it's not a big deal because diapers are for that. Even though it’s been a rare occurrence, I’d rather wear a diaper than obsess about what might happen.
I don’t think liking diapers because they make you feel safe and secure automatically makes you a DL. When I wear diapers for that reason it’s a different feeling than when I wear them for fun.