The problem is, it's a nuanced issue and most people discussing it are acting like it's a 100% yes/no issue.
Calling someone by their preferred name/pronouns: yes.
Physical medical intervention (surgery/hormones) for minors: no
Bathroom of preference: yes (there are stalls for privacy)
Locker rooms (where nudity is to be expected): no
Participation in social sports: yes
Participation in professional/competitive sports: no
Gender choice accepted for romantic relationships: those details need to be hashed out by the people involved.