That's what they think so if you think otherwise, you will be unhappy.
If you have known topics that should be deleted, then look for rules in your email app for that. Delete.
Few email services really block it from the spam bucket since false detections happen and we have to check the spam folder.
-> Also, if this is a free service then you will be also upset since they don't work it that hard, if at all. I find Gmail to be much better on spam control.
Is Microsoft just giving us the run around on SPAM? I am now getting 70-80 SPAM emails a day on one account. Most go to SPAM, but they are over and over the same topics - which I block. It makes it difficult to rescue legitimate messages from SPAM with this quantity. If the messages are the same over and over with different garbled email addresses, why are we still receiving them even though they are blocked? Do we need a NOMOROBO for MS SPAM? MS is apparently giving "lip service" to blocking.