This is not intended as a "flame SC" thread, nor advocacy of anything in particular. It's just an idea I've been kicking around lately, as a possibility, have a foil hat ready.
I was thinking about how Clash Royale seems to operate. And correct me if I'm wrong here, didn't like the game much so I deleted it, but there was no direct attempt to match based on deck strength for the regular game. You float up or down in trophies based on wins/losses alone, which makes you rise to a level where you often lose. And often, these losses are to someone who just has a better deck, or paid for that OP card that hasn't dropped for you yet.
The wins are fun, the losses are MOTIVATING. Its the losses (against a better deck) that pressure you to gem, pressure you farm harder, basically get you more engaged.
The random unfairness could also push players into the tournaments, some of which use different rules that enforce deck parity, and of course cost gems.
The strategy failed for me, I felt the pressure to gem too strongly, deleted it when it started feeling like a "pay to win" game. But clearly its a successful game.
Does SC apply the same thinking to clan wars? Thinking about how the player base at large differs from us in the forum here, SC might want substantial variations in clan war fairness. Sometimes you're the hammer, sometimes you're the nail. A group of kids, casuals that bounce between clans recruiting in global, friends and family clans that are tolerant of missed attacks? They need to see a win here and there to keep them engaged, hand them the hammer (beneficial match).
The better clan will occasionally need to be the nail to motivate them to keep grinding heroes and teching up the TH. When you lose due to an inferno/eagle mismatch, that's pressure to drop them for yourself. This probably seems wrong to most in the war forum, permamax and engineers are overrepresented here, but its probably generally true for clash at large.
Curious if this sounds ridiculous to others. I can't say I'm certain its true, but can't dismiss the possibility either.