Honesty doesn't replace accountability. Wasting three days is a long time to just be "procrastinating"

I can tell you've never suffered from ADHD.

So you are telling me a person suffering from ADHD is not accountable for the $ lost in productivity. If I had ADHD, just for survival, I wouldn't ever let my boss know that I have this condition which is costing his company X amount of dollars a year.

Most knowledge workers are paid for impact, not hours worked.

If your results-based performance is deemed adequate, that means either the company is getting good value for the money they pay you, or they have a broken performance management system.

ADHD doesn't really factor into it. If ADHD leads an employee to have subpar performance, they will be fired just like anyone else.

Caveat: the best companies think like this. Most don't.

Yep.

I've worked with people who come in late, leave early, and make huge, disruptive, positive impact as well as slow, positive change.

I've also worked with people who work 15 hour days who don't work well with others and are constantly picking up after themselves as their silo'd work breaks daily (yet from management's point of view, everything is running smoothly not realizing they have a giant bus factor on their hands).

So ya, nothing to do with hours worked and, if you're working for a decent company, there should be reason not to be upfront about this.

By not letting your boss know, you are making it harder on yourself, and then leading to less productivity in the future, as opposed to getting better. Also it isn't that it actually costs the company money. They could very well make up for that lost time by hyper focusing and finishing it quickly later. So it could be the same result for the company but much more stressful for the person with ADHD.

It sounds like you believe time and productivity are fungible. That's the real problem, not people being on Reddit during "work" hours.