Well I'm sorry about the MiG-21, last time I checked it wasn't working.
What I meant is that the campaign is very good and immediately caters to SP players, instead of pushing the module with future plans of adding campaigns, or waiting for the community to create content.
Besides, the amount of work required to create good 10+ missions long, fully voiced and documented campaigns isn't approachable by normal users, not if you want it coming free with the module itself. Most high-production value campaigns are additional payed DLCs.
If you're content in MP and single unrelated SP missions fine, but the fact that RAZBAM is coming out of the box with such content shouldn't be understated. And again, not "everyone" can create high-quality missions, let alone entire campaigns, unless your idea of a high-quality mission is throwing a bunch of air units and spawning the player in an airport with no guidance or story.
Different views, but you not being interested in well done out of the box officially supported SP does not make it irrelevant in the purchase decisions of others.