If Dak Prescott gets hurt and lost for the season, who do you think the Cowboys are going to call first? If another really good team is having a great year and they lose their starting quarterback for the rest of the season, who are they going to call first?
Look what the media did to Brett Favre .. retired, unretired, retired, unretired .. it became a joke, mostly due to media speculation and them camping non-stop around his property, rather than Favre himself.
I don't blame Romo for simply leaving. This way, if he returns, he can say, "I never said I was retiring!" but if he doesn't, he gets to go out the way he wanted. Because the Cowboys cut him, he doesn't even have to file retirement papers.