I don't think that's at all fair.
Its quite straight-forward to go from Allandale along the BCRY to the 400. IF provision were made within the 400 ROW for rail, its easy lay new track and at the appropriate juncture, side jaunt to Orillia and across (or follow 11 further and make the connection upstream.
Whether or not that should be a top priority is a fair discussion; but its a perfectly viable routing option, in theory.
There are essentially only 3 other choices, (if one wishes to remake the connection); the original route, more or less, which would be problematic for Barrie's waterfront and involve removing some subsequently built homes, tunnelling, or following BCRY beyond the 400 to make a greenfield connection.
That's not to suggest any of that discussion should necessarily be in this thread.