I get the feeling that the history of Saison has been cleaned up to make it an easier narrative. There's evidence that makes things a bit more complicated with stronger industrial Saisons in northern Belgium cropping up at the same time as the earliest documented examples of farmhouse versions. This isn't to say the things we've seen are wrong, just the evidence is more complicated than is often portrayed.
Even with the farmhouse versions Saison was made stronger to enable it to last the 3-4 months and to minimise the chance of lactobacillus changing the flavour. So more hops and more alcohol than the table beer that would have been regularly brewed at farmhouses. So I can see some justification for the high ABVs of today.
And there's a fair bit of evidence of really strong beers coming out of farmhouse brewing in northern Europe at the same time as the earliest saison records. It feels like the ABV range of historical saison has been taken from a small amount of evidence like Lacambre and applied a bit more generally than is reasonable.
Personally I like both the low and relatively high ABV versions, though the real top end ones tend to lose me.