Why not both? I make sure there's joy in every ride, whether I'm going to the store, going to work or out for a "pleasure" ride.

When I first started I rode with a similar cadence. On advice from the forums, I tried increasing it, monitoring my efforts with a cyclometer that measures cadence. The first time I hit 72 RPM I thought my legs were going to fly right out of their hip sockets. It took a while but these days if I'd under 90 RPM it feels like I'm pedaling in glue.

I don't know whether cycling alone helped, or higher cadence helped or none of the above, but I had knee problems when I started cycling. Walked with a limp for decades. That got sorted out in short order. Partway through my first year, maybe 2,000 miles behind me, I noticed I wasn't limping any more and my knee no longer hurt. Preventing knee injury was my motivation for higher cadence. Fixing whatever the problem had been in there was a wonderful side effect.

I used the technique BluesDawg recommends. Riding along I shifted to one gear easier, increased my cadence to maintain the same speed.