Trans women are statistically not dangerous to "biological women", and there are very few of them to begin with. These attempts to ban them from sports and bathrooms are guided by biased fears.

After a relatively short period of time on hormone treatments (a year or two), they are in the same competitive bracket, because suppressing testosterone decreases muscle mass and has other physically weakening effects. Look up the studies on this. Do not trust "common sense", because common sense can easily be wrong. Without doing the science, common sense said the earth is flat.