certain employers can use h1bs to fill specific employment needs really well, and have a ton of experience with both sourcing foreign labour and matching it to work that needs doing in the US.
its doing exactly what the program is looking for, filling a labour quantity at the price employers are looking for.
The US government is optimizing for being able to do some volume of technical work, and the the h1 is intended to make sure that the industry isnt limited by labour availability. its not particularly abusive to do that in an efficient way where the same h1b can serve many businesses
the alternative thats coming is going to be moving a lot of the work to india and instead having the local engineers be liasons for where the real work is happening
people in india havw to wait long periods because the green card system of country limits has no per capita normalization, not because of h1 visa abuse. its sheer volume of good people working for american companies in america, wanting to stay in america. Your anti-abuse metrics will bring it down from 15 years to 13 or 14. not a meaningful difference