Yes to all of this! That’s why Step 2 said to consider health issues as a possible cause, and the takeaway urged readers to talk to a GP. Two further anecdotes in support of what you’re saying:

1. In my case, in fact, I might’ve fallen out of the mood (partially) also because my GP had me taking an herbal-blend tonic for an iron deficiency… so I might’ve been “suffering” from any potentially endocrine-disrupting herbal effects and not just the physiological stress of a heat wave… on top of all the emotional stuff. Unfortunately, I didn’t realize the herbal tonic was potentially messing with me until I noticed that I was uncharacteristically anxious and irritable. Even non-prescription medications and supplements can impact a person’s sex drive, though, and people don’t usually even realize that because they don’t tend to think of OTC things as heavy-duty.
2. I had a weird period of low desire once in my 20s also, and I attributed it to my birth control. In reality, it was both my birth control and the fact that my partner of the time was abusive, but it was basically impossible to get my doctor to acknowledge that my drop in sex drive was a problem at all, or that my hormonal prescription might’ve had anything to do with it. He basically told me, “You’ve been having sex for a couple years now. It’s normal if you’re less interested in it now; sex isn’t as exciting anymore when it stops being new.” I was stunned and tried to insist, “No, sex is exciting to me. That’s exactly why I’m frustrated about not having much interest in it anymore. I want to be able to get excited about it again. I think it’s my hormones.” He still didn’t see things that way and just assured me that it’s okay not to be horny. It took me a year or so to realize I should find a new doctor.

Thanks for your comments, Steven, and best wishes!