The ugly answer could be that they don't really care about miner compensation or network security as much as they care about getting their slice (which they would actually be TAKING from the miners).
Now you care about miner compensation and network security? Weren't you the one complaining that you don't want to pay fees because you've bought the right to transact when you bought your coins, etc etc?
High fees = "fuck core devs"
Low fees = "fuck core devs"
For real?
I have said over and over that miners will get more fees if there are more transactions per block. I have said repeatedly that gross miner compensation will go up if we get bigger blocks because the exchange rate will go up because of increased network utility. I have also said many times that I consider miners employees, and any businessman knows that employees don't work if they don't get paid. Owners (hodlers) and employees both exist to serve customers. Both will be out of a job if we don't do that.
It's not personal. The Core Devs just have a poor business model. They can outcompete dinosaurs in a niche market and so they think they should be rent-seeking, but they are ignoring the alts waiting in the wings for them to slip up. Any businessman worth his salt will tell you that if you don't see the competition, it's not because it isn't there. It's because you aren't looking hard enough.