Your statement got me curious actually, so I looked up their 5-on-5 zone start % as a line, which actually turns out to be completely average:
2017-18: 42.33%
2018-19: 49.77%
On aggregate: 45.18%
Basically they start in their own end of the ice more often the other.
It's true that Konecny plays a lot with Giroux and Couturier, though just not in the cushy kind of role this might suggest. They aren't being fed the sort of prime offensive minutes like the Sedins in 2011 when they were pushing 70% offensive zone starts either, so perhaps there's something to be said about him actually being able to produce in deployment that isn't pillow-soft.
OTOH Boeser hasn't seen fewer than 60% zone starts in any of his most common line combinations with Horvat or Pettersson over the last 2 seasons, though of course those 2 are not quite where Giroux and Couturier are (yet?).
Either way Konecny's 5-on-5 performance in comparison to Boeser is definitely something worth keeping an eye on over the next 1 or 2 seasons.
Konecny's on the fly starts are highly offensive and he plays far more when the team is behind, benefitting from score effects.