I realized I do tend to book nonrefundable transportation more often than hotels
Likewise, I often book nonrefundable trains. And always non-refundable ballet tickets ... no choice there! But I'm willing to take that gamble to get the seats I want. In 2020, surprisingly, I got refunds for 2 ballet tickets. Automatically!
TexasTravelMom, yes, sadly, weddings (and lots of other real life scenarios) aren't covered by insurance.
As such, airfare is a dilemna for me. Yes, I can get a credit if I cancel. But today (with United, my Denver monopoly carrier) the credit is for travel that begins within 1 year of purchase. (I think.) Well, by the time I buy the ticket (say) 6 or 8 months in advance, and I probably have another couple of trips already lined up, I don't have enough time window to use the credit. (I would be so happy to be corrected if I am wrong on this!)
So, I pay United's upcharge for a fully refundable fare and consider it my CFAR insurance for my biggest cost. Just within the last 2 years, I've had to change enough flights that it's worth it.