In my thoughts to a couple of the points she stresses:
1) "Render unto Caesar the things which are Caesar's" - For all things where chromasomal (presumably) sex is important, like the different actions of diseases or the far-above mention of trans-men looking to solve issues with their original female innards, this should be as much a medical consideration as with someone having dextrocardia and/or situs inversus in a scenario where this matters.
What's more, there will be unknowingly intersex individuals who developed (externally, at the very least) in one manner despite having the chromasomes (and possibly other biochemical elements) of the other who might benefit from 'trans-aware medicine' as and when anyone bothers to find out.
I see no difference between the socially and surgically transitioned, developmentally flipped or even chimeric individuals, they all deserve the right application of the right treatment for the right aspect of any condition as it applies to them. That's no reason to decry transitioning, as it would still leave a significant number of non-transitioned people susceptible to undue assumptions and a reduced ability to identify and cater for such edge cases.
2) "Opening female spaces to all men..." is an undeserved wedge argument. I wonder how many predatory females have totally unfettered access to other (vulnerable) females, and all without the need to overcome stigma, various hurdles that even advanced M2F transitioners have to overcome and definitely under the radar compared to any bad-faith individual who tries to exploit access loopholes. (Never mind men who just find ways to hang around such female spaces as men, like countless creepy types always used to have to do...)
What protects young girls from predatory 'pseudo-trans' individuals? Well, everything that protects them from all other threats, plus additional mitigations born out of prejudices that I don't see going away.
Meanwhile, the still small minority of trans-women are being asked to make 'their space' be in the men-only spaces, vulnerable to the copious male-on-male type predators and transphobic+homophobic male-on-female types who may consider this an opportunity to physically or even (within the bounds of their own twisted version of personal 'no homo' convictions) sexually abuse.
At the very least, the sufficiently passing trans-woman could be mistakenly assumed to be a woman with precocious thrills for going into male facilities, giving 'normal' men the impression of something quite different, then they suffer from retaliation from either being a 'cock-tease' or a 'sissy', depending upon how far the encounter goes. Possibly both, by the reduced degree of logic that ends up being employed by the increasibgly confused antagonist.
Which is why I (cis-male, no real experience at the sharper end of either transitionary or feminist issues but hopefully would be accepted as a considerate ally of both sides, if allowed to be) think that the hyper-reductionist feminism version is particularly bad. As would be a given form of trans-militancy, but we're really not so much in danger of so many people suffering from the latter, on balance. To sum up my (admitedly unqualified) standpoint.