No. Wrong. Before I waste time discussing the numbers, the very first absolute must is the teams confirmation that the numbers have not been chosen randomly. As I stated: a professional regards the numbers as completely made up and not achievable by any means. It is not my job to prove legitimacy. This is Hydrominings job and their job only.
Anyone investing in this without further clarification is basically giving away their funds because the promised ROI stated on the website is not real and may even be a fraud.
The numbers are obviously not guaranteed. You never get a guarantee for speculative returns. Only scammers do that, which is why a lot of people fall for them. I would even go so far as to say that they are not allowed to guarantee them, but I'm no lawyer. They made it clear enough for me that this is a forecast, or a possibility based on their experience. So they are not random, but also not gueranteed. Personally I would consider that their experience was mostly during a crazy bull market... I always try to calculate very conservatively.
The calculator on the website is just a funny gimmick. It doesn't give you a forecast that you should rely on. It doesn't include the current difficulty, no difficulty increase, no change in price or any other of the many metrics that are relevant. It even says that it should not be used for any financial considerations. It's a marketing tool.
Just my 2 satoshi