Hi @rajansanand and welcome to the Speckle community! 
Feel free to introduce yourself.
We want to give our users flexibility for their workflows and some engineering teams prefer more control in Grasshopper. But I completely get your point, sometimes less is more 
You don’t have to specify all properties and loads in Grasshopper, just leave inputs empty and for required can use None.
Is this what you have in mind? Here is a Grasshopper definition and a test Speckle model, try receiving it to ETABS and check the properties. Let me know if this works for you.
https://speckle.xyz/streams/d741c82060/commits/7ea0cd62ab
minimal csi.gh (17.0 KB)