My comment was in response to " By the way a credit score is not needed to acquire a mortgage," rather than about a credit card. I 100% agree you don't need to have a credit card to purchase a home, but you don't need a credit card to have a good credit score either. I didn't get my first credit card till I was 2 years out of college and at that point I had a 750 credit score because I had been making consistent payments on my student loans, paid off my car, etc. etc. My point was if you have a credit score of 0, i.e. had never interacted with any finical institution ever, then it's much harder though not impossible to buy a house.
Rural Development Loans, per the USDA website, require a credit score. "To qualify, an applicant must meet the program’s income, credit, repayment, and other eligibility requirements." Also the program only applies to individuals looking to purchase a home in areas with a pop under 35k.
My point, is that hunting is fun and you can design a strategy using credit cards, savings accounts, ect. so that you can participate in the draws without having a huge effect on the rest of your finances. Also it's way easier to justify your hunting applications to your spouse if you accrue travel points from your apps and use those points to take your spouse on trips they want to go on.
Gotcha, I misread the conversation.