In your example with adobe, it is also possible that the particular keyword 'click here' was linked to that page by a large number of webmasters from their websites, so that page got optimised for the keyword 'click here', nothing unusual about it, it is natural linking which is what google talks about and likes most and which is what we should try mostly for, so luck plays a very less crucial factor.
hello i think the best way you might win the first prize in a lottery. It’s similar: how to be lucky in SEO? Answer : you need doing SEO.
I think most of the profitable keywords are competitive, so you have to face it every time. get lucky in SEO does require a lot of patience and hard work analyzing keywords. so "lucky" is sometimes very difficult.