OP, MBair for the apparent win here. Only the photo editing use has much potential to need MBpro horses... and that would need to be some intensive editing, which most people do not do. If "photo editing" is working on one photo, either is going to be fine. If you are optimizing hundreds of photos at a time, you prob need MBpro, if not Mac Studio.
Durability is not typically a big concern with Macs. They usually last at least 7+ years, which is about how long macOS will be updated for them. I've got a fully functional 2012 MBpro and a fully functional 2010 iMac still going strong. That 2012 has taken a lot of travel-related beatings. macOS has left both behind but the hardware itself is still just fine, running older generations of macOS just fine too. One thing the Apple Premium certainly buys is well-built computers that tend to last.
Apple Store employees and Apple fans are never going to discuss Apple durability, unless it's gushing praise. So you'll get little in that topic to help drive this decision. To 5 guys who can chime in with their horror story of failed Macs, there's 5 counters that someone's Apple II is still kicking about 40 years later. Besides, with Silicon Macs so very new, there's not enough history to pass much judgement on Silicon Mac durability model vs. model. Buyers basically gamble on the assumption that Silicon Macs will be as durable as Intel Macs. We'll all learn if that is true or false after a few more years.
Either Air or Pro will likely be durable enough to outlast how long you want to use them. Your stated usage is such that either Air or Pro should be fine for you. Some other more intense use objective in the future might tip the decision in favor or Pro... else "hot deals" for older Pros might make one more appealing than a newer Air.
I know when I specced up MBair on launch day, final pricing banged into "deal" pricing for various MBpros... and that derailed the purchase for me. When spec pricing gets close, may as well get the added horses.