Accumulating Bitcoin before getting married does seem much better, but that doesn't mean that every married person can't do something like that now. Because everything we do is based on a plan and also based on a path that we can take, so getting married does not mean it is an obstacle to being able to continue collecting Bitcoins using the DCA method.
Well I don't know the reason why you believe that accumulating Bitcoin before getting married is better, so perhaps does it mean that after getting married you will not be able to accumulate the way you are supposed to accumulate?, well for me it doesn't really matter whether married or not in terms of your Bitcoin accumulation because what is more important is having an accumulation pattern and remain consistent with it and you will see that even after marriage you will still be able to accumulate the same way you do.
Maybe what he means by collecting bitcoin before marriage is that he doesn't have any dependents, which means that when he gets the money he can buy more, whereas when you are married it means that you have to provide for your wife, so with the existing salary, some of it must be given to the wife and the rest you hold to buy bitcoin.
Actually it is up to you which one you think is more feasible to buy bitcoin as long as you have your own strategy, you can increase your salary means you can buy more bitcoin that's all.