I think it's the opposite. It's pointing out intersectional bias.
1. Doctors treat women patients differently than they treat men patients.
2. Doctors treat ME (cfs, SEID, etc.) patients differently than they treat other patients.
Those two biases *combine* into something unique for women ME patients.
There are also other biases - race, religion, class, weight/fat - that affect how doctors treat patients.
Bias against patients can result in poorer patient care than what would be given to patients without these factors. Or may even result in harm/death.
Pointing out issues that women have is not a denial that male patients with ME have a horrible time getting proper diagnosis and treatment. It's just pointing out that women patients (with and without ME) have unique issues with systemic sexism.
And systemic sexism absolutely includes sexist acts by both men and women. It's in the system. Patriarchy. You're soaking in it.
That does not take away from the pain and horror of how men with ME are treated. In fact, men may have have different issues with doctors due to sexism (not seen as manly, derided more for not working since men are traditionally the source of income, and so on).
I'm not an expert. I'm sure there are huge numbers of papers written on this that can explain it much better than I can. I just wanted to add a few thoughts. Not up for a lengthy debate.
Sending hugs to all patients - male, female, nonbinary - who have this horrible illness.