I always carry a pump.
Well, not always. I don’t carry a pump on my city bike when I’m riding 0-3 miles around town. But on any other kind of ride I carry a pump, two spare tubes, and a few tools. (I began carrying two tubes after receiving two flat tires on one ride.)
It can be argued that mechanical self-sufficiency is less critical in the era of cell phones. Still, if you ride a lot something will eventually come loose or break and you’re sure to get flat tires every now and then.
And in my experience, even having a tiny bit of self-reliance adds to the joy of riding.