there is a breed of miner associated with Monero who is not particularly interested in the Monero Network itself.
FIFY.
Miners of just about every coin, if not every single coin, are bottom feeders, don't give a shit about the network, and want the most money (and I love them for it; no hate here). This was proven in Ethereum where you saw miners jumping between ETH and ETC, in both directions, at the first profitable opportunity. They couldn't care less which coin or network they were supporting.
The Monero difficulty is hitting new highs, making the network more secure and valuable. Virtuous cycle.
Hes talking about botnets
People should secure their computers. Failing that, every bot node that is helping to secure the Monero network is one less that could be used to attack it.