Could Chemicals Applied to the Hair PERFECTLY Still Cause Hair Loss?

I don’t think my question about chemical relaxers causing baldness was answered, or perhaps I didn’t ask it right. If the professional never messes up the chemical relaxer on hair, can that cause baldness? I’m not talking about the occassions when they might mess up and burn our scalp, I’m referring to the chemical being applied perfectly to the hair.

I have heard many accounts that chemical hair relaxers have caused hair loss from the chemical stress/burn. Most of what is lost usually grows back, but it can take over a year. There is no such thing as PERFECT in real life and everyone has a different impact from chemicals, even a different impact over time (what worked in the past could damage your hair in the future).