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If you’re using correct form then there’s no reason you should injure yourself in a simple compound lift, unless you go mega heavy or haven’t warmed up properly.
If say, your back hurts after a deadlift then you’re probably doing it wrong, or one muscle group is fatiguing quicker / is weaker than the other. Some people’s solution is to throw a belt on which takes some of the strain, but this doesn’t improve the strength or mobility of the weaker muscles.
I don’t think using a belt will promote bad form or stop you from learning the movement properly.
Anyone doing the compounds should be careful if they’re not being coached, it’s not that hard to injure yourself pretty bad once the weight goes up