I generally agree - as long as you aren't loading MINIMUM charge weights for 38 special loads in 357 magnum cases.
The extra length of the 357 case gives more empty space under the bullet. This extra volume can significantly reduce pressure and velocity. There is the distinct possibility that the pressure may be TOO low - causing a bullet to stop before exiting the barrel.
All powders don't light easily, are position sensitive or don't handle reducing well.
But that should only be a concern if you use the absolute minimum amount of powder for a 38 special load in the 357 magnum case.
Even just a little "bump" of .1gr above the minimum 38 special charge should be enough to prevent this kind of problem.
IMO, I will only load mid-range 38 specials in a 357 magnum case. Most of my reloads are mid-range. I don't feel the need to load barn-burners, but I don't feel the need for bunny-fart loads either.
Middle of the road seems like the best course to me.
Better safe than sorry.
But that's just my opinion and YMMV.