Yes/No; let me nitpick this in a couple of ways.
The vast majority of Ontario families do not have children in the Separate (Catholic) School system. Even if one accounted for anyone in a household who had attended such, past-tense, your still a comparatively small minority. Yet, no major political party wants to remove funding/merge the systems.
The argument there is the same as for GO service.....angry voters are more likely to vote; and those who vote are more likely to be motivated by anger than by contentment.
Lets then add, angry voters are potential 'swing' voters; and if those voters are in 'swing' ridings that have an inordinate impact on whether a party gains or retains power, they have out-sized pull.
Voters in Bruce Peninsula who have returned a Conservative in every election for more than 30 years don't matter much; because the outcome of the election there is largely pre-determined.
But Mississauga, Brampton, Oakville, Vaughan and Whitby all swing. Mostly team red/blue; but in Brampton or Oshawa or Hamilton, team orange is also in play.
I think issue has potential. Do I think it moves the board outside the GTA? No, not really, but it has potential to swing more than a dozen 905 ridings. That, I expect will get some attention (or at least one might hope)