I hate golf... But bear with me.
A particular golfer might be able to drive the ball like a machine but hates putting. However you WILL NOT find a golfer who does not have a putter in his bag.
The point of the story is that if you are still arguing about only using one or the other, I'm afraid you have missed the point. The angler who has learned to use all the tools available when they are necessary WILL fish you under the table on the day. There is a time and place for multipliers and mono and one for grinders and braid, just as there is one for two speed reels and 100lb braid mainlines. It's simple. You can become comfortable with the myriad of tools available today to give yourself the best chance of hooking a fish, or you can sit on your little moral island of 'i only use this or only use that ' and watch as the anglers who are willing to be versatile give you the finger!