Yes the crossmember is weaker, but my concern is more with larger holes and their shape, like the 2x3 already mentioned, any hole makes it weaker, even when the cut out is welded 100%, unless the intersecting member has its own internally added gusset, the point being, bigger hole is worse. Whether the decrease in strength is acceptable, is why people drive fords, chevys, and mopars. twocents

Reality check, that half the population is smarter then 50% of the people and it's a constantly contested fact.