[Squirrelloid]

The problem Ulm has against sacred rushes is they're likely to be accompanied by a smite spamming priest (the prophet, if nothing else).

At which point Ulm has the choice of the Templars, who might actually be able to fight the sacreds but will die horribly to smite spam, and in their rather limited numbers can't really survive that. Or they can choose regular units (none of which they can mass especially fast, but faster than templars), who will have the numbers to withstand some smite losses, but won't survive the sacreds. And it really is a one or the other choice, because even with Pr3 Ulm will always find itself resource limited.