If a QB is there ranked worthy I agree, 100%
But you don't draft a guy for year 1 turn-around. That's fool's gold.
You draft a guy who can be dominant long-term.
Top CB don't always have top INT totals but they elevate everyone else by taking away options. Ramsay is a good hard-nosed tackle who can cover well like Mo but also can come up and knock a ball carrier silly causing fumbles.
Richard Sherman had 2 INT this year. Pat Peterson 2 INT. Talib 3, Norman 4.
Do I think Ramsay can do that? Yes. He's a better athlete than any of them except arguably Patrick Peterson.
I agree you don't take a guy based on just what he can do his first year, however the main arguments against taking a QB this year is that he won't help us win next year.
So if your going down that route then, the guy you pass up the chance to pick QB for, better be a big time contributor.
To me there isn't any player we're likely to pick at 4 who's likely to fulfil that remit.
And again I point at Newman, great athlete but with poor hands.
Turns out to be a good corner (still playing well for the Vikings) but not what you really want/need from a top pick.
Add that to Dallas inability to get many INTS from any CB it's had on the roster for a very long time, doesn't bode well for them turning Ramsey at CB into a Interception machine.