I wouldn't take Chelsea's win against Brighton as a serious one because this is not a premier league match but rather an EFL cup that clubs don't take that seriously to play with their first eleven teams.

I think Chelsea won the match against Brighton because Brighton had their attention focused more on their premier league match against Aston Villa than they had it in their EFL match against Chelsea. Still on, Chelsea have tried to prove a point that they can at least win a match despite their poor performance. Their Fulham match is what waits for them by the weekend, we see how it will turn out.