I saw a documentary in which it was said that another disincentive to antibiotic research is that its very use causes its effectiveness (for the general population) to reduce, due to antibiotic resistance. So that it would eventually stop selling.

It is not so in the case of medicines for BP, diabetes etc.

We may eventually need to have a compulsory hospital stay (or something else) for antibiotic treatment so that a patient treated with an antibiotic does not have any leftover resistant pathogens to transfer to the public.