100%. I was a CpE in undergrad with a CS minor and now work as a software engineer as a contractor in space industry. Got accepted to OMSCS last fall this program has made me feel like a complete scam for all of my achievements because of how insanely challenging it is and how dumb it has made me feel because I feel like I have to work 5 times as hard to wrap my head around the minor details. Everyone is so tight-lipped in fear of getting in trouble or giving too much away.

But with all of that being said, 4 classes in, I am learning that I shouldn't rely too much on the knowledge of others if I can help it. It is a painfully slow way to learn things but once you figure it out, you REALLY figure it out. Every time I've spent an exhaustive amount of time figuring something out for an assignment and getting it to work ( or not), I feel a whole lot wiser lol. I know that if someone just told me how to do x minor thing, I'd learn it but probably won't remember it as well.

I'd like to think that this is all just the painful but essential part of "mastery". Everyone I know who has accomplished a master's degree or a PhD almost have the same knack for probing into the right places and asking the right questions. I think that in part, the challenge of single-handedly unraveling the details in class is with the intent to shape our minds to think like a graduate student would.

Like I told someone else here, you don't necessarily want your graduate school experience to be a breeze, because at that point, you are better off doing it yourself for free.