Diversion = somewhere you go because you don't have a choice.
Alternate = somewhere you may go because where you wanted to go isn't possible.
Yes, a diversion can happen without much warning or other options. An alternate is the first choice, as there's some control over what's going to happen when you get there.
What I was suggesting was the basics, there's a lot more to this than the level of discussion here, and FR economics will also be a factor, if the landing fee at destination is (say) E500, and the diversion to a fancy well equipped local airport is E1500, and a diversion to a smaller but available airport somewhere else is E600, where are you going to go?
There's a lot more to this than just dropping in to another airfield just because it's close.
I'm not saying that FR's policy is right, wrong or a shade between I was trying to make the point that there's a LOT more to operating in bad weather than was implied by the original posts.
Simplified it might have been, B
s is is not, i've made enough flights and done the diversions myself for all manner of reasons.