I recommend reading any actual research on ADHD instead - you'll find out that motivation deficit and executive dysfunction are pretty much its defining aspects, and that it's not quite about seeking "effortless risk-less pleasures".

For example:

https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9066661/

https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3010326/

https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2626918/

https://www.sciencedaily.com/releases/2017/02/170216105919.h...

https://link.springer.com/article/10.1186/1744-9081-1-8

Even got you one directly related to this thread:

https://www.sciencedirect.com/science/article/abs/pii/S01651...

There's plenty of popsci too around the phrase "interest-based nervous system":

https://www.additudemag.com/secrets-of-the-adhd-brain/

https://www.psychologytoday.com/us/blog/optimized/202107/the...