I think I did explain it earlier but let me do this one more time.
I had to manually modify some values in the system because OMV doesn't have proper fields for this. This is today, say that in the next year I may need to change something and I may forget that I did that. I'd like omv to tell me this. Either by checking md5sum of that file that it has been altered outside of omv or by allowing me to instruct omv that this config file has been altered by me and there should be no possibility to edit it from the gui anymore. Either option is fine for me.
At the end of the day omv is just a tool like a car. And it obviously doesn’t fit your needs. Let’s say omv is a Smart. You would not ask a car company to change their Smart so you can transport 40 tons of stuff with it.