you have it completely opposite. WRs on the road are absolute junk and meaningless. It likes comparing cross country times. All that matters in marathon is place, and the higher the place the better.
No one talks about distance medals like they talk about Kimetto's WR or Paula's WR... same goes for Tedese's WR or the women's half marathon WR. Hell people talk about Galen's sub 13 5000m and sub 27 10000m speed more than they talk about him being a bronze and silver medalist.
So that is 100 percent bull and s h i t.
Speed will always matter more