The concept is universal that STD testing could be a bit intimidating or embarrassing or both to certain people. The concept of home testing evolved when a large section of people did not prefer going to the labs to get themselves checked for STD. the symptoms could be a little confusing as a normal yeast infection also has similar symptoms as STD. This is one reason why people prefer to anyway get checked for STD to rule out any symptoms but they do not want people around to know they are getting tested. The confidentiality of the report again is an advantage.
There have been many home testing kits and even mobile device apps which were capable of testing STD symptoms, but these devices could not have been tested for all the scenarios although they work fine on major cases. There are several entrepreneurs who have come up with home testing kits and have created an awareness among a large section of people how much it is important to get tested for STD when their symptoms. Early identification implies the treatment could be made simple and even ailment is possible in certain cases.
If you are a medicals student who is familiar with all the parts of your body and do not feel bad on seeing your blood and do not mind pricking to collect a sample, it is an indication that you could actually go in for a home test kit. There are several organizations which offer a home sample collection where they come to your place and collect all your samples and you do not have to run or hop between various medical centers to get all your tests done. Instead you could choose std testing at home and get yourself confidentially tested and await your results.