The fastest a woman has ever run the 100m was at a time of 10.49 seconds. Among male competitors for the 100m, that time would rank her 768th fastest in the world.
Even assuming that these guys that are going to be competing as women would be no where near the top of the male fields in which they compete, 768 is a pretty good size margin.
The argument they use is that they're taking drugs to remove their advantages. But they still went through puberty as men and their bodies developed into male bodies.
If they have to make their body weaker with drugs (!) in order to compete with women- isn't that, if you think about it for about 4 seconds, an indication that maybe they're not women? And what are the long term effects of taking these drugs going to be?