What did miss Maudie to jem "no accident "?

I tried to keep this in context for you;

"Who?" Jem's voice rose. "Who in this town did one thing to help Tom Robinson, just who?"

"His colored friends for one thing, and people like us. People like Judge Taylor. People like Mr. Heck Tate. Stop eating and start thinking, Jem. Did it ever strike you that Judge Taylor naming Atticus to defend that boy was no accident? That Judge Taylor might have had his reasons for naming him?"

This was a thought. Court-appointed defenses were usually given to Maxwell Green, Maycomb's latest addition to the bar, who needed the experience. Maxwell Green should have had Tom Robinson's case.

"You think about that," Miss Maudie was saying. "It was no accident. I was sittin' there on the porch last night, waiting. I waited and waited to see you all come down the sidewalk, and as I waited I thought, Atticus Finch won't win, he can't win, but he's the only man in these parts who can keep a jury out so long in a case like that. And I thought to myself, well, we're making a step-it's just a baby-step, but it's a step."