I'm going to assume this post was made out of ignorance rather than deliberate cruelty. So this is for @AnneLovesGilbert too because here is why ADHD may stop someone picking up the poo, metaphorical or otherwise.
ADHD is not an "excuse," it's a disability. People with ADHD struggle with executive function which means planning, sequencing and completing tasks. They have extreme difficulties switching from one task to another without getting side tracked. They find it really, really difficult to engage with low dopamine tasks and yet can hyper focus on areas of particular interest. They often have difficulties with time flow. And object permanence ("out of sight out of mind").
And for late-diagnosed women like the OP, they have had a lifetime of being sneered at for making excuses, of hearing "if you can learn everything there is to know about Pokemon then you can learn your times tables," "it's not hard to be on time, just set your alarm earlier," and so on, and internalise the shame and self-blame that comes from that. For early diagnosed children they can learn strategies to help (more on that in a bit) but OP has only just got her diagnosis.
The "it's an excuse" narrative stems from the fact that most NT people can recognise traits of neurodiversity in a way that they cannot recognise traits of a missing leg. There's an element of "doesn't everyone do that" - but just as forgetting your wallet doesn't mean you have dementia, being a bit shy doesn't mean you have autism, and feeling a bit nauseous and bloated doesn't mean you're pregnant - the answer is not to the extent that someone with ADHD does.
Sure, NOBODY likes boring tasks, and of course it's easy to get distracted, and everyone has lost their keys at some point. But if all of the criteria for ADHD are not met, and they do not have a significant and serious impact on your ability to carry out day to day activities - in other words, if you do find it no harder to pick up the damn dish than to post on Mumsnet - then congratulations. You are not a superior being: all this means is that you don't have ADHD.
You wouldn't go to a care home, pull up a seat and say "Well Marjorie, if you can remember the name of the girl you sat next to on your first day in primary school, you can remember the names of your own damn grandchildren," would you? It would be needlessly unpleasant and cruel. What you might do instead would be to work with Marjorie on strategies to support her memory (albeit dementia is a declining condition and ADHD is not).
The good news is that OP can find strategies to support her doing the things that she struggles with - for example asking her husband to body double for her, using visual reminders, a to-do list or electronic diary, setting an Alexa to remind her when it's poo picking time - but posting on Mumsnet to be snooty and derisive to a newly diagnosed woman about the things that are literally diagnostic of that condition is a dick move.