Why not design the proposed online survey using the actual survey tool? Question:
Assuming no school prohibitions on doing so, why would you not design the proposed survey in the proposed survey tool, and include screenshots of the survey in the proposal?

Background:
I edit dissertations and students are increasingly asking for formatting guidance for their proposed surveys. The handbooks from the schools of interest have no guidance other than that the design be approved.

Consequently, I am wondering why I've never seen a proposed survey presented from screenshots of the actual survey tool; but I've also never seen a prohibition on it. Instead, I always see a mock-up using Word or Excel. 

My guess (and that's all it is) is that maybe no one mocks it up in the actual survey tool because--as part of the proposal process--the reviewer(s) might recommend another tool. So mocking it up in the actual tool could be a waste of time.

Note: I realize my question is rife for opinion rather than a black-and-white answer. But I couldn't think of any other way to ask it. To recap, assuming there are no school prohibitions on doing so, why would you not design the proposed survey in the proposed survey tool, and include screenshots of the survey in the proposal?
Students use the tools they are most comfortable with. If the excercise does not limit the tools, then that is only right. In my field (sociology)  most of them have put many many many more hours in Word or Excel then in some survey tool, so if this were an excercise for my students I would expect to see the pattern you report. If I wanted them to get experience in the survey tool, I would need to change the text of the exercise to require them to use that tool.