Oh dear.... seriously? You're coming with "have you ever been in a fight?" Really?
Look, you're conflating terminology, and mis-applying it, as well as completely missing the question itself, and what grappling actually is.
Grappling means "methods of seizing, holding, grabbing, including controls, locks, throws, holds, pins, and so on". It is distinct from striking, which is the percussive application of impact against a target utilising parts of the body (fist/foot, head, etc). That's it. You can grapple on the ground, and you can strike on the ground. You can strike standing up, and you can grapple standing up. You can use both as transitional methods between the ranges/contexts, in both directions.
The question is "Does karate include grappling?". Not "Does karate include ground combat methods?". Nor "Does karate not strike on the ground?". Or, really, anything else you're implying. And the answer to that, if you understand what grappling actually means, is clearly "yes". There's no further aspect to it.
The deeply flawed argument of "but what are you gonna do?" (Hulk Hogan? Ha!) is frankly pointless, as it's not a part of the question at all. Saying "but there's a different context and situation that the art is not designed around" is meaningless... karate is karate, it's not whatever you want to decide it should be about.
And, to be completely clear, you have no clue who you're talking to regarding this topic.... yes, I've been in fights. No, I don't train in karate (I did when I was younger). Yes, I train in grappling systems, specifically older ones. Yes, I've trained in modern ground systems as well. Is any of this relevant? No. Do I see what you're saying? Yes. You're saying you don't know the argument or what the terminology means.