It would certainly be profitable.
It's like when these operators say they're going to stop investing. We're so used to this kind of talk, it's always the same thing. Do you think for a moment that they're going to stop investing? There isn't a company that's going to stop investing, because if they did, they'd have their market taken away by the competition.
This is all the more problematic for Bell and its yesteryear technology. Bell was the last telecom operator to invest in fibre. All the other North American operators, such as AT&T, Verizon, and even Telus, had invested in fibre long before. Bell was late to the party. What prompted it? As an operator, Bell was losing significant market share. It no longer had a choice.
Today, if you stop investing in fibre, you'll lose customers, pure and simple.