You were the one to pull bullshit out of your ass, so you should back up your claims, but here:

Mixes are not more healthy or better in any way, it just means that they inherit random things, good or bad. The problem is you never know what you get.

Allergy is not caused by pet hair, but dander saliva and urine.

Have a nice day, I got to walk my dog now.

https://www.akc.org/expert-advice/dog-breeds/mixed-breed-purebred-health/

https://www.aaaai.org/conditions-treatments/allergies/pet-allergy