It seems to me that nowadays, Everyone is trying to be a musician. I can't really compare to previous generations but I think that the more we see people making music in their houses the more accessible it seems thus making more people want to make music. I also think that the rise of bedroom musicians has to do with how much more music we have access to compared to previous generations.
I'm going to go a bit off topic. I believe that because we are a generation that virtually has headphones glued in to our ears, we understand music more than previous generations have.