Agreed. And I'd say there's a lot of support or at least apathy among Torontonians for jets this time around. I live in downtown east (about 1.5 km from the water) and before Trump I often used Billy Bishop to fly to the USA. I will do so again in 2029 presuming the political climate has improved. As a downtown resident and frequent Harbourfront visitor, I don't mind jets and I'd probably cycle down to watch them land and takeoff.
They allow small jets to land at London City Airport (1,508 m runway vs 1,216 m at YTO), where it is surrounded by housing, recreational boating and parkland and the city hasn't gone full panic.
And it's best to do the airport expansion now before we design and build housing at the new Portlands. We can now keep the towers below the flightpath and any potential residents will be fully aware of airplane noise before they commit to buying or renting in the Portlands. Not that it doesn't stop people who buy near Pearson from claiming surprise and annoyance when airplanes fly overhead.
This hardly looks like a disruption of the harbour either.