To me the clearest difference between the trans movement and the gay rights movement is the messaging around identity. The gay rights movement encourages people to accept themselves, and is generally devoted to living in a way that's truthful and honest to who you really are. It's about acceptance of oneself and self love, and it's also against the lies straight people told when they pretended gay people didn't exist. In my opinion, honesty and truth are healthier than lies, and so a movement that is pro-honesty is a healthy movement.

On the other hand, the trans movement is all about denying reality and running away from the discomfort and pain caused by gender dysphoria. The message of the movement isn't about self acceptance, but about changing yourself into a new person, then forcing everyone around you to affirm that new identity. Trans people claim that they transition to become their true selves, but anyone who has (oftentimes accidentally) invalidated a trans person's view of themselves knows how fragile this transformation is. That's why they feel the need to censor conversations about trans people in a way that LGB people never do, because even the smallest dissent can break their denial. A movement that requires people to be constantly denying reality is a movement based around sickness rather than health.