Sure, you presented a case for why it wasn't a good idea (I'd agree), but then said in the end you'd be okay with giving up Beck + 40th overall for Rossi (I wouldn't agree).
There's no missing context there.
To be blunt, it's patently nonsensical to go on such a rant about how Dach plays like he's 5'9 while simultaneously saying you'd trade Beck + 40th overall for an actual 5'9 C.
Maybe Dach pans out and you're wrong, maybe he won't and you're right. But either way, if the issue with Dach is the fact he plays like he's 5'9 (your words), bringing in an actual 5'9 C doesn't make much sense, does it?