I would agree. Lighter heads with brass insert combinations aren't as strong structurally than a heavier head and standard insert.
The failure modes of a light head impede penetration upon impact of bone on the shots that may be off target a bit. (curled tip, bend aluminum ferrules, bent or chipped blade edges)
The construction of a heavier head by nature to become heavier naturally mitigates some of those failure modes seen in the lighter broadheads. (Full steel ferrules / Thicker blade widths)
With the traditional market where it is today with the endless options for heavier heads, I don't see a need to use a sub-150 gn broadhead if I am targeting 200 - 300 grains up front. (VPA, Simmons, Tuffhead, etc etc are some of the highest quality heads on the market and tailor their offerings to heavy, bomb-proof, traditional heads)
If I were to have my eye on a lighter head that really tickled my fancy, I'd buy the glue-on version and mount it to a 100gn steel ferrule, and run it with a standard insert rather than buy the screw-in version that most likely would come on an aluminum ferrule. At least I am mitigating one failure mode (ferrule integrity).
My $0.02