How do we respond to those who say that we need doctors, lawyers, etc.?

Answer

We need our Imaan and Akhlaaq more than the need for doctors and lawyers. We were created for the Aakhirat, not the dunya. If pursuit of any secular career entails ruin of Akhlaaq and Imaan, then confound the career. Allah Ta'ala is the Raaziq. Our Rizq is sealed and predetermined. It will come through the roof if one is compelled to abstain from secular pursuits for the safety of one's Imaan.

Only those suffering from either the disease of abject weakness of Imaan or bereft of Imaan present such vile and flapdoodle arguments in justification of activities which are explicitly haraam and even destructive of Imaan. If among the conditions for admission is clearly stipulated that commission of fornication and other haraam activities are requisites for acceptance, will these socalled Muslims allow their sons and daughters to study at such institutions and will they present the self-same justification? We venture to say, yes, they shall do so. And, that is because they have extinguished their Imaan.

Whilst the acts of fisq, fujoor and kufr are not officially acknowledged to be integral to university life, these evils are camouflaged very superficially with the veneer of 'education'. A Muslim of sound Imaan will not tolerate his daughter or even his son to attend any of these 'educational' brothels and dens of vice and immorality.

pay him the exact amount.

Regarding a grocery store, firstly, most of the products sold are halaal. Secondly, the owners are kuffaar. The money they earn is lawful for them whereas the money a Muslim barber earns is haraam.