Equity should mean giving everyone the support they need. The problem that cartoon shows is that it actually gives some absolutely nothing. They aren’t allowed equal opportunity to advance beyond where they are.
Because the support given is relative to the goal. It's okay if not everybody "gets something" if they don't need it to try to achieve the goal. If the goal is to see over the fence to watch the baseball game, of course the tall kid on the left doesn't get anything to assist him, because he doesn't need it. He already has everything he needs with his two long legs. When you go to the movies, some people sit in a chair and listen with their ears, some people sit in a chair and listen to audio description because they are visually impaired, and some people sit in their wheelchair in a designated space to watch the movie.
Let's use an educational example. When students attend college, some students need assistance to be successful their first year. Universities offer tutoring, counseling, and career counseling to help students when they need academic and social support. When I taught years ago, there was also a specific program designated to support migrant students who had not had consistent schooling. It provided academic and social support from people who were familiar with the needs of that specific population. That has since been merged with a multicultural assistance program. There are also programs that provide supports to veterans and students with disabilities. There are supports for everyone, and supports for some that need them. It takes nothing from one group to offer assistance to the other.