Yes that's fine, but it also doesn't necessarily try to [1]. LCDM can't explain linear Tully-fisher, can't explain external field effect, can't explain why satellite galaxies are long lived, can't explain why bullet cluster even exists (galaxies shouldn't be going that fast), can't explain early galaxies, etc.

[1] so maybe it shouldn't. There's a lot of systematic uncertainty in some of those really large scale movements. For example suppose our standard candle was off by half an order of magnitude at the largest scales. For LCDM, not a problem. Reparametrize the distribution and ratios of dark matter. Presto chango theory still works. That this should be possible should scare you.