Is ADHD really that debilitating?

On another platform a female journalist warned other women not to use menstrual tracking apps.

I worked in a co-op during college that sold very nice paper journals for tracking menstrual cycles. I replied to that thread mentioning that very nice specialized paper journals still exist.

Someone ( a man ) replied back to tell me that ADHD women have enough to deal with these days and proceeded to list all the ways something like that could fail.

I suggested sending emails to one's self along the lines of "update your diary" which someone could then read at home and take care of things.

Since I don't have ADHD my question is if people who do have ADHD really do find it to be that incapacitating?

I know it is an Internet thing to keep replying without a reason, even if it is only out of momentum. I'm wondering if that was the deal in that thread.