There is no real invasion. The influx is due to the ease of getting into the rap game now. Before you had to have prowess on the mic in all forms. Nowadays, if you can produce some candy ass beat talking about bytches drugs and money you're pretty much guaranteed a shot.
Needless to say, white peeps know how to use a computer. Making beats won't be shyt as well as slapping it up on some social media site.
In the end, the bar was lowered, the floodgates were opened, and people bought trash ass Wayne and Gucci albums. Those people are to blame.