You think people are just choosing to not change habits?
Do you also dislike people taking PrEP [0] because they could just change their habits?
If anything this drug has shown is that habits and biology are so intertwined.
“Following dietary advice” is very hard, as evidenced by the 2/3 of the US who are obese or overweight (and the 50% of Western Europe).
It’s also hard to follow economic advice, as evidenced by not everyone making $250k/year.
Similarly, if there was a new drug that cost $10k/year that made people make 30% more annual income, people would definitely take that instead of just studying harder or whatever advice they could follow to increase income.