It's a little of column A, little of column B, but in a mixed way. A lot of doctor visits for basic health issues are ones that can be dealt with over a phone or video call. Routine stuff like updating your medicines, changing dosages, showing a bruise or dealing with a mild fever don't require you to be physically present at the doctor's office. Having to deal with insurance, scheduling, waiting times, driving to the doctor's office in the middle of the workday are unnecessary for a large proportion of the sorts of day-to-day issues people deal with.
Telemedicine isn't a panacea, but in a system with major constraints on doctor bandwidth and where in-person visits are very expensive, it's extremely helpful. And yeah, a lot of that is because so often the solution is as you said -- get more sleep, eat better, maybe work out a little, reduce your stress. I'd much rather have a quick 15 minute call to be told that, instead of having to take several hours off work to go visit the doctor in person.
After having a stress-induced LAD heart attack at the age of 46, my cardiologist gave me the "you need to reduce stress" line and I responded with "Oh, so you're not going to send me a bill for that stent in order to help me reduce my stress?" Apparently he believed that my heart could handle the stress of that bill after all.
And yet, it works a lot more often than you'd think. Just having someone who you perceive to be in some kind of position of authority tell you that it's okay to relax and calm down can have a significant effect on one's stress levels. And it works even better when you're not having to worry about how much listening to the doctor tell you to reduce your stress levels is going to cost you financially.
While doing my PhD at a top-tier college, I went to their health center for psychological counseling and said "I can't study and concentrate well, I don't sleep enough, I don't do enough exercise, I eat crap, and I drink too much." The expert told me that I needed to study and concentrate better, sleep well, exercise more, eat healthily, and drink less.
Telemedicine isn't a panacea, but in a system with major constraints on doctor bandwidth and where in-person visits are very expensive, it's extremely helpful. And yeah, a lot of that is because so often the solution is as you said -- get more sleep, eat better, maybe work out a little, reduce your stress. I'd much rather have a quick 15 minute call to be told that, instead of having to take several hours off work to go visit the doctor in person.