Glad you are thinking this over.
I learned to jump after 40yo.
I trail ride but lots of obstacles on my trails and my horse would jump sometimes and I was clueless how to handle that. And I liked the thrill.
So, I took some jumping lessons. GO FOR IT!!! I'm talking about very low obstacles, but it's so much fun!
Now, at least I know how to follow the horse and get out of her way when we jump the occasional downed tree or ditch. It is very useful, even if I don't intend jump anything high in an arena.
I've been jumping a bit, up to about 70cm, just not with this horse. I've even done a competition at 50cm, with all the kiddos - it was quite hilarious. So I'm familiar with how it's done, but I do need to practice.
You are quite right, it is very handy. My former instructor insisted that all her students practice jumping at low heights because you never know when you'll need it.
Just the other day, a girl had a bit of a misunderstanding with the horse she was riding and jumped over a large pile of branches - very unplanned :) That particular horse loves jumping, she took another kid over a 1m fence, also unplanned :)
Oh, and I just remembered a great show of horsemanship displayed by a dressage rider who never jumps. She was standing still next to the arena rail, about 1.3m high, talking to her friend. No-one knows why it happend, but her horse decides to jump the rail AND the friend from the standstill. Onto concrete. All we heard was the sounds of a horse cantering/galloping off. Just a bit later, they walk back in as if nothing happened. She got a big round of applause.