Thank you for breaking down the types of martial art schools. My brother and I attended the same school, but our focus made us take different classes with different instructors. I was being bullied and hit every day, so I took a lot of sel-defense and practical applications classes. I still learned katas, but they were secondary to my goal. My brother learned how to do beautiful katas, but he hated getting in a ring. Outlook and preparedness is everything, and something people overlook.
You’re illustrating something that I accidentally skimmed over; almost any martial art can be taught with a practical outlook. This isn’t just things like Muay Thai, where the application is obvious, it includes martial arts you wouldn’t expect, like Tai-Chi.
The key here is having an instructor who can teach you to apply what you’re learning in a real world context.
Karate is an easy example to dogpile on. Almost all practitioners you’ll find today will be recreational ones. You will find a great many who can’t apply what they know outside of the Dojo. Except, Karate wasn’t developed for self-defense, it was developed for guerrilla warfare.
Karate is not a Japanese martial art, it’s Okinawan. It’s easy to conflate these now, but this becomes a very important distinction when you look at Karate’s history. Okinawa was formally annexed by Japan in the Nineteenth Century, and the original Japanese invasion and vassalization of Okinawa dates back to the early Seventeenth Century. (I’m skimming over a lot of the history; if you’re interested, you should read up on this.)
Because of this, the Japanese were seen as an occupying force, and Karate was specifically adapted to kill Samurai. (Okay, I’m being a little reductive here, Karate technically dates back to the Ryukyu Kingdom, though, much of what we have today is a result of these adaptations.)
The modern incarnation, dating back to the Japanese vassalization of Okinawa, is designed to interdict and preempt entire segments of a Samurai’s combat training. Not all of this will be relevant today, and I wouldn’t recommend a low strike to prevent your opponent from cross-drawing a gun, but it will directly block an Iaido practitioner’s draw. (Note: I’m extending the definition of, “modern Karate” further back than normal. “Modern Karate,” usually starts with the founding of Shotokan in the mid-twentieth century,)
When we’re talking self-defense, Karate’s probably not going to be the right tool for the job, But, this is a martial art that was originally developed to kill people, and some of that can still be applied to interrupt and disable an assailant. The underlying combat philosophy of preventing your opponent from attacking with preemptive strikes has real applications. If you can understand how to bring this stuff into the real world, it’s viable. However, because it requires staying ahead of your opponent, you really need to know what you’re doing. That’s the weakness, this was designed to deal with foes who would act in very predictable patterns. If you don’t know what your opponent will do before they act, the value suffers.
That’s an example I’m personally familiar with, however, there are a lot stories like this, where a martial art started out as a method to kill or incapacitate your foes, and has gradually transitioned into something else. Again, if this stuff interests you, read up on it. Some martial arts have fascinating histories.