He can? It's not like they specifically made the fights easier for some people :P But he also has to deal with the same challenges that everyone else has to deal with. If he didn't, then he would actually be getting a different experience from all the other people who are also paying as much as him.
The "I pay for my sub so the game should work around my style"-esque arguments just don't fly. If everyone's allowed to use it then the game would have to break itself with all the contradictions between people's play styles, and if it only applies to certain people then the comment subverts its own message of equality.
eg: I also pay a sub, and blm is my favorite class. I should be able to cross class cover to use with manawall for style points. After all, my preference is just as valid, my sub costs the exact same. So why is this preference not okay? Because it would unbalance the game for other players.
Paying for the game pays for access to playing the game; it does not entitle you to automatic completion of the game. This is how all games work. The experience you seem to be looking for is called television.
E: On the one hand I get that this is a casual game and all. But coil is the only difficult content in the game. Just let us raiders have this one thing and you can have literally the rest of the game handed to you :/