Yup thats true! thanks for searching it out (Not gonna lie with the first sentence i really thought you were trying to mock me off for having such a simplified/too obvious picture with the typical red circling
it sounded like sarcastic)
I think a card sticking this badly is a serious problem. I will make the point however that when I'm pulling stuff out (RAM, PCIe, if it goes up too far on one side I'm assuming it is catching on something on the other side so I try to get it all lined up for "straight up and out" or "straight down and in." It is true that one needs to rock the card or RAM sometimes a bit.
I find it very difficult to depress the lever under a big card and typically use a philips to do that.
I have heard that WD40 is not electrically conductive I would be tempted to find out if that is true and whether taking a cotton swap soaked in wd40 would help in a situation like this. Could be a nightmare though one of those things you read on the internet and it screws up everything. The picture shows a lot of dust around the PCIe slot so clearly the component is stressed.