The rewards, lounge access, etc is an extra. Don’t consider them if you don’t want to. A decent spending on the credit card (even if it’s ₹5k) helps maintain a credit history. This is useful when applying for loans.
Another way I see Credit Cards is a source of emergency money. If I have money locked in Mutual Funds or Stocks, it takes time to redeem those. Some funds like Liquid ones have instant redemption, but mostly takes a day or two for other funds to give your money.
Having a credit card is like having an emergency fund. You can swipe now and pay 20-25 days later. I have two credit cards (both free) with a sizeable limit. If something happens and I need money instantly, I can swipe the card.
Obviously, I should always have the money that I swipe in assets I can liquidate before the billing cycle is over. But helps me take more risks by investing in sources that don’t have instant redemption.
Specially in case of a health issue where I’m not in a position to take a decision and withdraw funds, my family can swipe the card. Once I’m in a better position, I can guide my family on what investments they can liquidate and how.