As others have mentioned, it is not so easy, in fact, I have been able to claim better chests in a high league, against a good enemy, they attack a lot = resources and targets to attack, then, good chests.
a while ago we had to change the club, because the president we had wasn't active, we started a new club, from the first arena, and was a pain... yes, it is true that chests are cheap, but the reason is that actually claiming points is not easy. The problems:
1. In the first arena, the boosters are not available, so, you can't use jackpots or energy pumps. So, you practically need to launch 12 B Movie Monsters if you want 12000 points for gold.
2. The energy is incredibly slow, you get 1 energy in 15 mins, so, you just get 4 energy in one hour! , you need two hours to launch one B Movie Monster and remember you need like 12 to claim that ''cheap'' chest... (Energy booster not allowed )
3. The enemy is dead, that was the most annoying thing of all, we ''fought'' a complete club with only levels 1, none of them, in all the war, none !, repaired just even 1 house, and also 0 points in the CoM, is like the system just put those club so you can rank, but those clubs are dead, i think, none of them started the war or what? idk... but they never respond, i was really annoying to know that Arena 1, Arena 2 and Arena 3 was like that, yes, it took us 3 months to move forward, when we reached the Arena 3, we was hoping an enemy who at least repair one house, but nothing there, still all dead, notice that in my team we are 11, and we all wants chests lol, so never was enough even to get 3 blue chests... ☹️ Also, we have to always do deliveries, during those three arenas... because we never got cheaps parts by being attacked, was really expensive and hard, was just at final in the Arena 3 when they started too wake up a little.
The Arena 4 was also bad for us, the enemy started to be more ''alive'', but they just conceded and don't fight, when they look us and notice that we have more levels than they, they just don't want to fight back, is like they think why loose resources and time? we can't win this, just forget this war... , so they repair some buildings but never the last one, and stay like that all the war.
Finally we are in Arena 5, and finally we get enemies strong enough who decide to fight and we can claim even gold chests, because they give cheap parts and also they rebuild if you bubble they fast before they attack and before they get their chests, so they need to go out to make points, with that you can force they to be constantly a target for you.
So, I will recommend that you do not go back, but it is still your decision.