You're misusing the concept of equality here. Equality doesn't mean "everyone exactly the same". If it did, disabled parking spots wouldn't exist, you wouldn't have to give up your seat on buses for the elderly, and veterans wouldn't get priority boarding or discounts or anything like that. And before you say "that's a false equivalence", it's really not. Being misgendered can trigger intense dysphoria, a psychological state that can be incredibly debilitating. Plus, this is much smaller inconvenience. Having to park further away because only the disabled spots are available is a nuisance and can be a major hassle, but apologizing for getting it wrong takes like 2 extra seconds, and saying "he" instead of "she" takes the exact same amount of time. You're making some sweeping statement out of what should be a common courtesy.