I had a student bring a Glock 44 to her CCW pistol test. I shot it, and I immediately knew I needed to get one. It was so much FREAKING FUN to shoot. It had all the fun that a 22 pistol brings to the table, plus it had the shape and feel of my normal Glock 19 carry gun.
On top of that, I shot a 1.87 sec Bill Drill with it.
Short answer: Yes, I think they are. They’re not optimal and shouldn’t be your first choice, but if it’s a choice between carrying a 22 and carrying nothing, carry a 22, and practice with it until you get good.
And considering that it’s a 22, there is no reason NOT to practice with it.