Gotta compare the Ts&Cs. It’s important to note that the Ikea credit card does not have trip cancellation/interruption insurance. If you miss a trip (and the airline is not at fault), you won’t get your bookings reimbursed. Interestingly though, I’ve never been in that situation - it was always the airline at fault so I could never claim on the trip cancellation insurance. But the coverage for unexpected costs (which you get with the Ikea card) always came in handy in those situations for the expenses that weren’t covered by the airlines.
I can relate to the Ikea points being kind of useless, even at 1% of spending. The Cumulus points are much more useful (I use them to pay for municipal garbage bags). My ideal would be the Amex Cashback credit card with these insurances.
One card which I can highly recommend if you do a lot of traveling is the Libertycard Plus. I go it with a special promtion so paid half price permanently. It has pretty solid travel insurance perks (including trip interruption/cancellation), bicycle insurance and a car rental collision damage waiver, and the insurance applies even if you don’t use the card to pay for bookings. Just those benefits saved me a couple hundred francs per year. Plus around 1.6% rewards for public transportation, gas, and travel bookings redeemable for gas stations, SBB and SWISS vouchers, among others. But there is the annual fee.