Let's have a closer look at the claims you repeat from the article.
1. "Average hormone levels
also vary wildly from person to person according to genetics, developmental and environmental factors, and a host of other variables. So a “normal” male or female testosterone level actually describes a broad range".
Not true. It's a range only within M and F levels. Male and female levels of testosterone hardly ever overlap, even in women with conditions like PCOS.
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2. According to experts,
it’s more a rule of thumb than a hard-and-fast metric.
This links to a Guardian article on a doctor who treats prostate cancer in men and Dr Cordelia Fine who says cultural factors affects behaviour more than we acknowledge. The article doesn't support the idea that testosterone levels are 'a rule of thumb'.
3. 'It’s far
easier than many people seem to think to find AFAB people with naturally “male” T profiles or AMAB people with naturally “female” profiles'.
Not true. This claim links to an article on Caster Semenya - who has high testosterone levels because they are a male. A male with a dsd, not a female with high testosterone. Semenya's T levels are normal for a male.
4. 'People’s testosterone levels also swing around wildly throughout the day and move up and down in response to developments in our lives: Men seem to experience notable dips in T
while caring for a new child, for example'.
The support link is to research that shows male testosterone levels dip in fathers of new born. It does not dip into female T levels and is temporary.
What's your point in listing these articles by journalists with an agender? It's the hope that readers will take them at face value, believe their unevidenced claims, and somehow swallow the line that men with low testosterone are really just the same as women and should therefore be allowed in women's spaces.