Here's a good example. I have hypothyroidism. My thyroid gland does not work very well, and requires very high amounts of stimulation (thyroid stimulating hormone) by the pituitary, to function normally. It can still produce adequate hormones, it just needs a lot of ***-kicking to do so. My TSH is 8. The normal TSH is 0.5-1.0 for a healthy person.
Here's the thing. No one asks themselves, why does a 20 year old ( I've had it for at least 3 years ) not have a perfectly healthy thyroid? Nobody gives a crap about that question. Instead, you get replacement hormones (synthetic T4, thyroxine) which is supposed to take some of the workload off your thyroid and provide your body with the hormones, so then your TSH falls down to a "normal" range, and your lab results are "normal". That's it. Whether or not I take those pills, I feel EXACTLY the same (which is far from good).
You still have the same sum total amount of hormones in your body (because whatever amount you take in pill form, your thyroid just produces that much less as the TSH falls), and you still feel as crappy as before, but hey, your lab results are good, so that's that. No one ever bothered to figure out why my thyroid was not functioning properly. I never got an answer to that question. Ever since they invented those pills, they simply stopped attempting to give a ****. No one looks for cures, or causes.
Just ask yourself - when is the last time we actually cured something, in the true sense of the word?