Actually, they genuinely do struggle to score. It's not a game 7 issue, it's a back half of the series issue. I've posted about this before but here is the statistics on Leafs series since JT has joined (excluded 2020 as it's 5 games and does not fit the typical mold)
Games 1-4: 3.33 goals per game (40 in 12)
Games 1-4: 2.58 goals against per game (31 in 12)
Games 5-7: 2.11 goals per game (19 in 9)
Games 5-7: 3.22 goals against per game (29 in 9)
The offense starts hot and then completely falls apart as the series goes deep. The defense does falter as well, though not as significantly. Really, as the series goes deep and teams make adjustments we tend to decline.
Yeah looking at his numbers, 15-15-30 in 82 playoff games is below where he usually produces
With that said, I think Nino would've still added an element this team needs with his size and physicality even if he wasn't scoring as much as usual (still higher than Kerfoot's scoring in the playoffs though)
It feels like Kerfoot is one of the many utility players we employ. They're good individually but as a whole there's not enough diversity in the lineup