Why is the proficient person auto-succeeding? Because their bonus is just that high? Then, sure, no problem. Otherwise, no, I would call for rolls.
Being proficient does not equal being a master at something. Especially in D&D. Good grief, barring other stuff, the difference between someone with zero skill and talent and a proficient, max bonus character is still only +11. ((Yeah, yeah, there's expertise and whatnot, I know that, but, otherwise, this is true). Which means that adventurers, barring those additional modifiers, are never so expert at something that someone else can't ever succeed where they fail.
What that +11 means is that you can attempt stuff that the unskilled person can't possibly succeed at - anything DC 21 or higher. So, in many situations, yeah, you're fantastic. But, sometimes, if the DC is under 20, there is a chance that the unskilled person can succeed where you fail. It happens. And it leads to more interesting stories IMO. Why did that unskilled guy succeed where you failed? What happened?
Making "Proficient" even better than it is just means that we should go back to the 3e days where you had those who could make the check and the rest don't even bother. Not interested. I love the fact that in bounded accuracy, anyone can potentially contribute to most scenarios. That's the point of bounded accuracy. So, why am I giving extra bennies to those who have proficiency? They already get pretty good benefits. It's just not worth the work to me.