There's a difference between "choosing one over the other" and the original claim of shelf stabilized probiotics being not worth buying.

On a few occasions when my dog has gotten sick, or needed antibiotics, shelf stabilized probiotics cleaned their digestion right up.

Are strains that only survive when refrigerated probably a higher count? Maybe. Are there stains that are better but can't be freeze dried? Probably. Are there shelf stable probiotics that are worth buying, especially if you don't have access to refrigerated stuff? Absolutely!