Presentation software like.
If that's what you think how bout the other way around? How can you evaluate content without design? No typography, no colors, no layout, no styles, all those things that convey the important signals that go beyond the mere textual, hierarchies of information, weight, emphasis, oblique stresses, priorities, all those subtle cues that also have visual and emotional appeal to the reader. Rigid proponents of content strategy may shun the use of dummy copy but then.
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General Contracting
This is quite a problem to solve, but just doing without greeking text won't fix it.
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Architecture Style
Using test items of real content and data in designs will help, but there's no guarant.
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Interior Design
Then a prototype or beta site with real content published from the real.
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Construction Consult
It might be a bit annoying but you could tell them that that discussion would.