There are many programs that deal with character focused work and your right as I well also know Maya is the app of choice, but there are many reasons that is the case and its not just because its better, but because the industry has adopted its workflow, invested allot of money into scripting, and training. The grass is never greener on every patch of the turf for other software equivalents but there is a devide as why someone goes between either C4D or Maya.
So back to the initial point that there are many programs out there that is dedicated to character work. There is a defining point between high end tools for professional results, and serious hobbyist, to generalised hobbyist that dont have these high end expectations and are happy to play. They are all valid in their own right but the cross over point is between the serious Hobbyist, freelance Professional, and full time professional whom works within a studio.
I know many whom fit within both the serious Hobbyist and part time professional freelancer where 3D is not their sole source of income yet both for their own personal serious Hobby in making higher end industry quality art, and the odd freelance work requires the same quality outcome yet this cant be done with just any tool. The time and money it takes to get very proficient in a app is significant, the on going cost to keep a subscription alive only when you can afford it, or have some work pushes out the serious hobbyist, nobody can keep the cost of Maya for personal work, and that is where C4D fits in. C4D has a artist friendly ease of use that you do not get in Maya according to many I know whom use it, Maya is very complex, very expensive to keep up the maintenance costs in which you need to be earning from it regularly to keep its costs going.
Peoples circumstances change such as income, bills, health, age and if one had in the past times initially invested outright in a perpetual licence when their circumstances where much better then they still have that perpetual licence for life giving them the same tool they know well, still being able to produce great art work, and get the odd job. While Maya may be the app of choice for character work, its not a ideal choice for many because of the above reasons.
Dan