Yes baby yoda is definitely the catalyst for that show. If baby yoda wasn't a hit, the show would have probably ended up a big miss. Heck, you could make the argument that without Vader, Rogue one wouldn't have landed as well as it did. That final Vader scene is one of the best in all of star wars.
I get that, especially for people who aren't huge fans of the clone wars/rebels stuff. Ashoka is extremely popular, I'm not a huge fan, but she's one of the most loved characters. So it makes sense since we really never got her stories conclusion.
While I don't think that star wars needs the Skywalkers. And I have been at the forefront of knights of the old republic being the next thing. That way you only need to follow the basic rules of the universe. And you then aren't burdened with legacy characters. That said, Luke is the only logical one to end up with baby yoda. He's the only true Jedi left and the one rebuilding the order.