You wouldn't buy from a breeder who's dogs hadn't been radiographed?
Yes, I wouldn't get a puppy from a breeder who hadn't had their bitch x-rayed in accordance with the IVDD scheme and used a stud who had also been scored and whose results complimented those of the bitch.
Many breeds do have health issues (though certainly not all) but how "risky" it is depends on the nature of the condition and whether there's a reliable test available or not.
For example if there's a DNA test available for a particular condition then a breeder can (and obviously should) use that test to absolutely guarantee that no puppies they produce from that particular mating can possibly be affected by it.
For other conditions the best there is available is more about stacking the odds in your favour than absolute guarantees. Although the hip scoring scheme, for example, has been successful in reducing the average hip scores in various breeds however it is entirely possible to have two dogs with low hip scores produce a dog who develops dysplasia. The same is true of the IVDD scheme in dachshunds and also the heart and MRI schemes in the CKCS. They're very much better than nothing and breeders absolutely should be utilising them but they don't offer any absolute guarantees.
Some breeds are also affected by health conditions which are directly related to the shape they've been bred into. IVDD in dachshunds is one of these, as is brachycephalic obstructive airway syndrome in flat or short faced breeds. Personally I think it's (at best) ethically dubious to be breeding dogs into forms that pre-dispose them to disabling, painful and even life-limiting conditions.
I find the UFAW pages about different breeds to be very useful sources of information when it comes to heritable health issues affecting various breeds. It's not quite exhaustive but it covers a lot of breeds and conditions.