Of course it takes practice regardless of if you have ADHD or not, but ability to focus on something absolutely has something to do with ADHD.

right, so just like pretty much every other aspect of life you can still do it with ADHD, it's just a bit more difficult than it is for the average person. hardly seems worth pointing out when it applies to virtually everything.

Responding "nothing to do with ADHD" to someone complaining that their ADHD is making it harder to concentrate is simply incorrect.

they weren't "complaining that their ADHD is making it harder to concentrate", they were claiming that it straight up doesn't work if you have ADHD, which is nonsense.

meditation takes practice for everybody, it literally is absolutely nothing to do with ADHD.