Any particular reason why they should be getting prescribed these meds instead of making some changes to their food and exercise habits?
Yes, and their doctor (who is infinitely more qualified than you) is more than capable of deciding how to treat patients with obesity and their possible need for a weight loss shot.
And how is it gatekeeping weight loss? Is someone proposing physically stopping them from losing weight? I don't recall seeing any armed guards posted at the Planet Fitness or the Fruit & Veg section at the supermarket.
It's gatekeeping because you feel like people who need to lose weight should do so in a way that makes them worthy of the weight loss. We don't tell smokers who get lung cancer that they need to do the "hard work" to curing their cancer. We let them get medical care. We don't tell people injured as a result of their own negligence that they need to do the "hard work" to recover, foregoing meds that may help them.
The big difference is that we live in a fat-phobic society and there is this perverse belief that if one is overweight, they need to prove themselves and "earn" the weight loss through exercise, deprivation, and misery. I think people like seeing other people who are obese so that they can have a "I would never let myself get that obese" or "look at how they are compared to me" and have this elitist attitude that because they don't have that particular sin, those who do are worth less.
Would you label concerns about anabolic steroid use as "gatekeeping building muscle"?
Not a comparable situation.
Taking a pill is not a lifestyle change. Changing the diet and exercise is a lifestyle change.
Let me tell you, taking a pill is a lifestyle change. You have to manage getting the medication, taking the medication, manage the side effects, keep up with the doctor at a rate that's more frequent than somebody not on medications. Even doctors say taking medication requires a change of thinking and lifestyle that shows commitment to doing what you need to do to be on the medication. You yourself were even implying that there were lots of debilitating side effects, acknowledging that taking these medications has a significant impact on a person's lifestyle.
Maybe you're lucky enough to not have any conditions that need managing with lots of medications, but as somebody who does let me tell you, you're perpetually doing mental calculations about how to take them. This one has to be at night because it makes you sleepy, this one has to be before dinner because it gives you reflux, this one needs refilling next week, that one is on a taper so you need to change dosage next week, this one makes you nauseous so you have to take it before bed and with melatonin... It's work. Lots of work. And it's a lifestyle change because this is now my everyday reality.
If this were a conversation about cholesterol issues, nobody would consider "I got on statins" as "making a lifestyle change"
Yes, that would be a lifestyle change. Not going through the effort to get your medication you need, that would be rejecting a lifestyle change.
Nor is is actually making a person healthy if they're using it purely for weight loss and aren't introducing those other two aspects in conjunction with it.
If someone is leading a sedentary life and eating fast food six times a week, taking a pill or injection that makes the number on the scale go down by 10% (while changing nothing else) isn't making them a healthy human being.
So, again, it's about gatekeeping. They're eating fast food but taking a shot to keep weight under control, they are unworthy of the benefits of weight loss.