Firstly, (and this is important) when asking any question on Pakistan, kindly avoid citing Indian sources:
The linked article is written by Maria Abi-Habib who writes for NYT and is based in New Delhi, India. I checked her written articles in NYT and I found that all of her Pakistan related writings are full of negative connotations of Pakistan.
The linked article says:
At independence in 1947, Hindus composed 20.5% of the population of the areas that now form Pakistan. In the following decades, the
percentage shrank rapidly, and by 1998 — the last government census to
classify people by religion — Hindus were just 1.6% of Pakistan’s
population. Most estimates say it has further dwindled in the past two
... this is a false statement as by 1971 East Pakistan (aka Bangladesh) got separated from West Pakistan and most of the Hindu population was from the East and they stayed in the East.
This article also doesn't make any distinction between forced and voluntary conversion.
Most of the Hindu population lives in the interior of Sindh which is a hot, arid, and inhospitable place to live in. No option for them to grow food. So, it is nearly impossible for them to change their financial status.
Also, Sindh is a very corrupt province of Pakistan where the Pakistan People's Party(PPP) is in power and PPP doesn't let the federal government interfere in Sindh and the ruling party PTI is having a tussle with PPP in this regard. So, the situation is the same for all. Hindus are neither an exception nor targeted.
By the way, as far as I recall, last year PM Imran Khan distributed Health Cards to the poorest people of the interior Sindh.