Anyone understand the purpose of Proxy render/output format?

Question

So I've done a couple of projects with X now and am fairly happy with the proxy workflow:
1) Ingest, creating proxies, but no optimized - render format set to ProRes regular
2) Edit in proxy
3) In preferences, switch back to "Use original or optimized"
4) Tweak edit
5) Render and export
However, I'm still not understanding the thinking behind the render/output format (full-resolution proxy) when you are editing in proxy. It seems to me that it SHOULD be:
EITHER: When you're editing proxy, if you render/export, FCPX renders/outputs in proxy using the same low resolution as your proxy files. This would be great for early, quick samples for clients. No need to spend forever rendering full-res ProRes regular, or the pointless upsizing of pre-rendered lo-res proxies.
OR: Even while you're editing from proxies, background rendering is done in your full-quality format (i.e. 1080 ProRes regular). This would save you from re-rendering when you switch back over to original/optimized.
Ideally, there'd be a toggle to choose which of these you want. Even without a toggle, Apple should pick one of these it seems. The way it is now seems useless.
SUMMARY:
While editing in proxy, render/output should be either:
1) 720x540 ProRes Proxy
OR
2) 1920x1080 ProRes Regular
BUT NOT
3)1920x1080 ProRes Proxy
I was going to send an enhancement request about it, but figured I'd first see if anybody knows of a useful reason for it instead being this third, awkward format.
Thoughts?

Answer 1

I had hoped the summary would clear up the question. I guess not. Let's try this again:
QUESTION - Would other people like the output, when in proxy mode, to be a low-res ProRes Proxy file - the same size as the files that are created when you tell FCPX to make proxies of your original files?
DETAILS
- When you create proxies of your original files, they are a low-resolution of "something"x540 (in my case 720x540)
- If you output while in proxy, you get a proxy output file at 1920x1080 - this is 5.3 times as many pixels to render as 720x540.
- Assuming a linear relationship between number of pixels and render time, this means it would take over 5 times as long to render the current form of proxy output, as compared to what I'm asking for.
- I want a quickly-rendered format (like 720x540 Proxy) so I can quickly render/output, change things, re-render/output, sending multiple sample files to the client.
- Of course, the ability to mark in/out on the timeline and export just that section is also important here, but that's another post and has already been discussed.
- For further details, see my original post
As for my workflow, I don't need to work with either/or. I work in proxy (which, if you're doing more than straight cuts, allows better playback before rendering, no matter what computer you're using) until I'm ready for the final tweaks to graphics or the edit that actually rely on fine detail, and want to output in 1080 Prores regular, at which point I change the preference back to original/optimized, like I said right at the start of the first post. No mind reading necessary. I then tweak, render and output. I'm not sure you're understanding the purpose of a proxy workflow.