You made a point but the manner you presented was little bit inappropriate..........
If I was making a comment on mufti sahib's religious contributions, you could say that the he should not be challenged.
However
.......Mufti Taqi Usmani specialized in Islamic Finances and well known for his work. He is the only one scholar in the world ....
Islamic Finances is a dhoka bazi in the name of our beautiful religion.
Just like "Modern day - Islamic medicine", or "Modern-day Islamic engineering" are dhoka baaz aka deceptive terms
When you are replacing a heart valve, there is nothing Islamic or unIslamic about it. Sure one can ask a Maulana to say a prayer, but that's it.
When you are building a new bridge on Jehlum, or a new dam on Sindh, you do not go look for Islamic-engineer, you go to the West and find the top engineers who KNOW how to build a dam, or a Western trained Pakistani who knows how to build a bridge.
surely one can say that a bridge design by a Western trained engineer, collapsed. But that doesn't mean that EVERY fing bridge built by the Western trained engineers have collapsed,
While our Madrassah trained enigneers have built the bridges that are better than golden gate etc.
That is if you can ever find an engineer who got his degree from Deobund, or Nadwa, or banoria town.
When Dubai wanted to build the tallest structure, they didn't go looking for a Mufti to design their tower, Did they?
Similarly when you want to build or repair your financial systems, you do not look for a Mufti either. You go for someone who is TRAINED in the West about banking and finance.
In fact if ever a Mufti comes by your house and tell you that he can replace your Islamic-heart valve, build an Islamic-bridge for you, or a construct an Islamic-dam, or design an Islamic-1000-story building.
Just tell him!
Mufti sahib, I respect you. Please go back to your Madrassha, and tomorrow Inshallah I'll send a daig of Halwa.