I did it for 7 years as a child.
The closest I got to actual physical contact, was mimicking a strike in slow motion, with a partner's hand being the 'pad'.
So in my experience, yes.
I also did some karate briefly before going to boxing. It's different like night and day.
At karate we did some useless katas and there wasn't much strength and conditioning going on. You see a lot of out of shape people, middle aged guys, women, kids... There were some drilling of punches but not any real contact.
Then I went to boxing and it's totally different, you see in shape athletic people, people who compete regularly, extremely intense strength and conditioning, intense heavy bag and speed bag workouts, much more realistic work on pads and of course a lot of sparring.
I'm not saying all of karate is useless, but most karate schools are. It just doesn't have the same reputation like boxing or say wrestling which are trained like sports, with emphasis on real competition and real fighting contests. Maybe there are karate gyms who work like that but they're extremely rare. Probably at least 80% of karate gyms are just some recreational hobby type of thing while in boxing it's likely the opposite, 80% of gyms are sparring oriented.
In the vast majority of cases you can't go wrong with joining a boxing gym, it's a place for real fighters and it can be quite intimidating, it builds character and puts people in real tests, you'll get your ass kicked but you'll also learn a lot. That's why in these stand up fights in case I don't know anything about either of the fighters I'll always pick a random boxer over random whatever else not because boxing is better technically (it's not because it doesn't use kicks) but because it's more likely that the boxer has gone through some serious training and has some hard sparring behind him and is also in great shape while a lot of these karate and kickboxing gyms are mcdojos or cardiokickboxing/boxercise type of things.
That's probably the case in the video posted above, karate guys were probably hitting air most of their training while boxers were sparring and doing push ups, sprints, roadwork skipping rope etc. In the video you can see that the boxers have much better knowledge of range and timing which is a result of more real sparring experience.