I read it as: regardless of Robinhood's volume, their popularity has caused other organizations to restructure their investment opportunities, and that has benefited all users.
It's the same as Tesla making electric cars popular. They don't sell the most cars, but you'd have a hard time arguing they haven't moved electric vehicles forward.
It's the same as Tesla making electric cars popular. They don't sell the most cars, but you'd have a hard time arguing they haven't moved electric vehicles forward.