Don't know who the guy is but I refuse to shave with any razor that has not been stropped very shortly prior to use. The advice to buy a strop "at some stage" is for the guys who don't really care about fine and smooth razor feel

Must admit that it doesn't HAVE to be a strop - can be a belt, etc.
Sorry if my quote did not do the author justice. He does indeed cover that there is no hard rule to sharpening and stropping and that,sometimes it is sufficient to sharpen it at the ball of the thumb, especially if the razor is not used for several days. he mentions that after the burr will wear out and require a suitable strop.

I was trying to stick to the fin description, check out the link as I think it is worth a full read.