Is Paid Diners Black Metal Worth it?

So I've been trying some calculations to figure out if the paid DCB Metal is even worth it when I have existing LTF or relatively far lower fees cards. I have SBI cashback, SBI Vistara Prime, Airtel Axis, Regalia LTF + Marriott Bonvoy, ICICI sapphiro LTF and Indusind rupay LTF. My calculations are: According to 16.5% on flights, to get back 11800₹ which you're paying in fees, you'll need to spend 72000₹ just to break even, leave the profits🫠 And this is considering max rewards. (I'm leaving hotels for now) That's like 10 economy flights! Even if you spend on Amazon via gyftr, it's 9.75% return. To break even you'll spend ₹121000 on Amazon. The profit comes later🫠 I understand that someone with extremely high spends annually could make use of this card well. But someone like me who only spends on necessities, couldn't get good return even if I'm eligible for this card. (Renewal fee waived on 8L/year spends and get 10000 points if quarterly spends 4L for every quarter) So possibly this card is not for me🤌🏼