IMO
lower back muscles are better structured to carry heavy weights, but not so much the forearms. I don't mind using straps, because theres no shame in playing it safe.
what i do is go up to about 3 plates and 25 on each side barehanded, then use straps afterward because the momentum starts to make the bar slip out of my hands around the 4th rep.
one thing to keep in mind is that deadlifting is a lower back exercise, so fuck the forearms. Straps or not, if you're doing full reps, it's all good.