I guess people asked similiar question in the 20th century when that sports thing started to be a money-making machine. It took quite a few people off their agriculture jobs (full-time players or part-time hobbyists/spectators).

Fast forward to now, how many people play tennis? How many follow it as fans? How much does the world's number 1000 earn from their playing?

It is online so the percentages are going to be more favourable. OK, but did online poker boom empower people in Nigeria or Venezuela? Also, did it last forever?