Tender meat has nothing to do with Halal. Halal is a certification that food has been processed in a manner and uses only ingredients that are acceptable (lawful) to those of the Muslim faith. Not surprisingly, it also involves money. Mecca and sharp knives have no affect on the cooking process which is where tender meat happens. There is a lot already written about tender lamb and beef on the forum. Here is one discussion from a while ago.
https://www.curry-recipes.co.uk/curry/index.php?topic=13188.0I'm not sure about the UK or other parts of the world, but over here it is essentially not possible to buy meat products that aren't Halal certified, and we pay extra for the privilege, Muslim or not. I was in the large wholesale butchers the other day when the serving attendant took a phone call and confirmed to the caller that all meat and chicken sold was Halal certified. I know that the large supermarket chains also make the same claims. I used to deliver goods to the local abattoir where the certifying Imams could be seen every day.
One of my best fishing buddies is a practising Muslim. I have no problem with Halal but it isn't the difference you are seeking.
Chuck steak and stewing steak is recommended because it is the best cut to use for long slow cooking, and it is more affordable. There is no way I would ever make a curry out of Rib Eye Fillet or Sirloin. There are 3 reasons. Firstly the cost, then the fact that the meat simply wouldn't stand up to the cooking process and lastly because there are many better ways to use quality meat. At a pinch you could use Rump or Topsides for a curry. (Flash wok frying fillet steak is a different matter.)
The same applies to lamb / mutton. Legs and shoulders for curry. I've also lately been using shank meat which works really well but I have other preferred dishes for shanks. Loins and backstraps are not going into any curry I make for the same reasons given for beef.