As much I as love Martha's S3 ending, how it means so much to me on a personal level, the whole "Martha Jones is so strong she doesn't need the doctor" has never sat right with me. Her strength should be praised, but the only reason Martha was strong is because she had no other choice. It was be strong or let Ten keep putting her down across time and space. It was be strong or let Joan Redfern be racist to her. It was be strong or let the Family of Blood murder everyone. It was be strong or let her family get tortured. It was be strong or let the Master kill you for fun.
Martha doesn't need the doctor because she had to outgrow him for her own wellbeing, not because she inherently cares less about them compared to everyone else.
Had she been treated with kindness and grace like every other companion, she could have "wanted" him like the others. It's wild to me how in a show about the magic of space and time the first Black companion's main thing has to be... that she doesn't have to have any of it apparently. This othering dressed up as a compliment of how unique she is. You don't set someone on fire then congratulate them for putting out the flames.