Somewhat.
With out giving a lot of thought a few weeks ago it would have been more like - they will finish the season and playoffs. But when contemplating odds ....
The one thing that gave me pause when I sat and thought about it awhile, was the managers and coaches. Lets say one of the older managers or well known coaches catches it and ends up in an ICU bed, ventilator or not, that would be pretty hard for the league to play through.
The players have caught it, more will likely get infected, but they will be asymptomatic for the most part or with mild symptoms. They will quarantine, recover and return. So the players don't give me pause. But from a PR standpoint, those managers and coaches like Francona, Dusty, etc., that are household names, seriously ill in an ICU bed, because the league is playing, has to be a nightmare outcome that the "negative press shy" MLB would find it hard to weather, all the not so friendly headlines that they would be certain to see.
So you could say the 15%, is the chance I would put on "the wrong" (from a PR standpoint) person contracting the virus and having a life threatening case of it.
And this isn't any kind of moral statement about who it is or isn't OK to catch the disease. Or whether PR is the right thing for the league to pay attention to. It is a pragmatic rating of the biggest factor that I see the virus creating that would heavily influence the DNA that seems to make up MLB execs.