There is no actual substance to the article other than an unsupported feeling of fear. Dr's can be for or against all sorts of things (though rarely have articles in the DM)
You could listen to a random NHS psychiatrist who has no experience in this area simply because she is aligned to your ideology,
Alternatively you could do some actual research
You'd find that hormone blockers are in the realm of Endocrinology and that the International Endocrinology guidance, last updated September 2017, and followed by the NHS, finds that puberty blockers are a safe, reversible and effective treatment for gender dysphoric adolescents from Tanner stage 2.
www.endocrine.org/advocacy/priorities-and-positions/transgender-health
Which is it to be?
One random 'gender critical' psychiatrist, who has 'feelings' and 'anecdotes' and attended a 'WPUK' Bristol meeting.
vs
30+ years of Evidence based practice by the international experts in this field. The guidelines are endorsed by the world’s leading centres for evidence based practice: the American Association of Clinical Endocrinologists, the American Society of Andrology, the European Society for Pediatric Endocrinology, the European Society of Endocrinology, the Pediatric Endocrine Society, and the World Professional Association for Transgender Health.
Here's a quote from the accompanying position paper:
“The medical consensus in the late 20th century was that transgender and gender incongruent individuals suffered a mental health disorder termed “gender identity disorder. Gender identity was considered malleable and subject to external influences. Today, however, this attitude is no longer considered valid. Considerable scientific evidence has emerged demonstrating a durable biological element underlying gender identity. Individuals may make choices due to other factors in their lives, but there do not seem to be external forces that genuinely cause individuals to change gender identity.
Although the specific mechanisms guiding the biological underpinnings of gender identity are not entirely understood, there is evolving consensus that being transgender is not a mental health disorder. Such evidence stems from scientific studies suggesting that: 1) attempts to change gender identity in intersex patients to match external genitalia or chromosomes are typically unsuccessful; 2) identical twins (who share the exact same genetic background) are more likely to both experience transgender identity as compared to fraternal (non-identical) twins; 3) among individuals with female chromosomes (XX), rates of male gender identity are higher for those exposed to higher levels of androgens in utero relative to those without such exposure, and male (XY)-chromosome individuals with complete androgen insensitivity syndrome typically have female gender identity 6; and 4) there are associations of certain brain scan or staining patterns with gender identity rather than external genitalia or chromosomes
In summary, although there is much that is still unknown with respect to gender identity and its expression, compelling studies support the concept that biologic factors, in addition to environmental factors, contribute to this fundamental aspect of human development.
Data are strong for a biological underpinning to gender identity”