I am really very sorry, I didn't think I was discouraging somebody. I just wrote what I felt like that's the reason I didn't use the word can't but I used hard instead (which you thought is blanket 
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Before I say anything let me share an experience. I wrote a few Rinno apps for my team but just because I couldn't provide login facilities to it. I had to hand it over to an IT person who is efficient in python. He created all those for me. He even created CRUD part of database.
In my defence.
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I know no other language but sql and r. So I couldn't use js or c++ for CRUD or login. And it's very easy to add buttons on a bootstrap layout. But in shiny dashboard I have to go through js again (How to create this user panel on top right corner of shiny).
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And it's very easy in powerBI to group data so that it can be browsed in just a click. That's why I said relatively hard. I didn't say is not possible.
I don't mean to belittle anybody I think if these basic steps would be improved. New bees like me would have an easier time navigating.
Thanks for pointing things out to me. I was just sharing my views and I even wrote a list of pros too..