Hey "brah"

There are indeed industries that are more ripe for disruption than others.

Count the amount of years it's been since there was true innovation in an industry. If it's over 10, it's ripe. If it's less than 10, it's not.

In other words, if the barrier to entry is extremely high due to constant innovation, it will be very difficult to disrupt, hence not "ripe" for disruption.

Additionally, you need to consider the capital investment required to enter a market.

Starting a car company: incredibly expensive, thus, the auto industry is not ripe for disruption.

Starting a higher ed tech company: small competitive landscape, potentially cheap entry into the market. Ripe for disruption.

P.S. Not sure if you noticed, but your hat's crooked.