I don't hate wheatens! I don't hate any dog (though a few wheatens have more then pushed my buttons)! I actually for bad to the breed as a whole, mostly pity!
I already said that I am sure you could point to the atypical but those who are knowledgeable on SCWT, admits they are largely an extremely high maintenance, neurotic dogs! Yeah some may occassionally be sane but they were not bred for sanity! They were bred for top level drive, animal aggression & the spunk needed to chase a large rodents, pests into crazy environments & kill them!
Everything about these dogs is the most work (training, workouts, grooming, etc) but they can make wonderful ratters, agility, flyball (& even certain jobs) where they can be free to be their neurotic selves! The shear grooming demands are to the extreme (if you don't they will needlessly suffer horrid skin problems! Most disabled people have enough on their plate without adding +1~3hrs daily brushing, +daily shower, +weekly nails, teeth, etc; + 3~5hr full make over every 4~6 weeks; +doubling or tripling the typical required workouts/training! The list goes on, frankly my clients aren't coming to me to get them a dog they need to fix or turns the person to the helper instead of being helped!
Besides the simple truth is I would put my double coated, shedding nightmare up against the so-called hypoallergenic dogs any day; & I can be sure almost no one reacts to my well groomed SD but at least some react to the hypo dog breeds (though anyone can react to anything)! I've seen lots of people allergic to SCWTs! They always feel ripped off when they learn their hopes for an easy allergy fix are dashed!
Aside all this, the larger problem is generations of poor breeding! Wheatens may have had an edge for being slightly less likely to cause an allergy but that attracted the backyard breeders to the SCWTs & the consequences to the health/well being/genetics of the breed has created a breed that I pay no attention when selecting SD candidates! I have too much riding on the success of the match that I avoid anything but the best!
Actually the same principle applies to why I don't typically use labs, goldens, poodles, st bernards, dobies, rottis, etc. They all have been the victims of social popularity that attracts the bad breeders & ruins the breed genetics resulting severe health issues & short lifetimes! I am not putting 1~3years (up to 5) of my life for a dog that will die/wash out in less then 5 years? My last guy was 14 & able/willing to work right to the end! He was 115~125lbs & 29" at shoulder!
Even if they get to 7/8 you are lucky! These breeds have all been damaged by generations of poor breeding & the flaws are obvious! Labs & golden used to have great fronts & rears but now dysplasia is rampant & they can't rightfully placed for physical bracing, balance, guide, etc. They aren't bad dogs but when the choice is a healthier (on average), longer lifetimes, lower genetic risk; i am going to choose the latter! Again with all that's riding on the outcome, it pays to be picky & cautious! Its even easier when you are knowledgeable about the various wonderful rare breeds without all the baggage!
At the end of the day, i keep saying breed is less important then the individual dog themselves! I have always said, if I had wheaten, lab, etc. candidate in front of me that was otherwise perfect & the handler understood all the pieces, then I'ld consider the dog!
I am not saying SCWTs are bad dogs just typically poor candidates! I also said I am sure there are exceptions to the rule &/or wonderful wheatens, just that there is better choices!