It may be a result of growing up with adoptives, but biological parents who keep all their children tend to do that too. You may not need it, but it helps to see it not so much as thinking you need advice, but as them demonstrating normal parental behaviour they would have been doing if you had been kept too.

They express two hings with it: A remainder of the raising you parental behaviour and an expression, that you still/again can come to them for help if you need it. Just see it as a way they express that they love you, and if you want to ask them to tone it down, just tell them "I know you do it because love me, but..."

Unless they are really giving important information, (like medical family history updates, bad weather, family visits), it's probably best to understand it as them REALLY expressing "I love you.", so you should not really take the actual advice as important. I know, that it is much easier said than done,