Within the creative industry in Japan Nissin's sponsorships are pretty common and well respected.
For example steamboy, one of th most expensive anime productions, relied on it. So the placement in ff is if anything a mark of quality.
Furthermore Nissin has a pretty strong brand in Japan. Their museum is a pretty popular local visit destination. Their souvenir cup noodles are a common sight at regular family homes.
Japan sort of never lost the soap opera style product sponsorship. Thanks to the production committee style of funding anime the sponsorships serve as key early money. Aka, that specific product placement is itself an artistic expression.
Japan is more than capitalist enough that their major brands are also valued parts of their culture.
FFXV is already a modern Western[0] RPG where the main characters drive a luxury car and wear tech goth leather jackets. And SE's #4 flagship is a Disney advertisement.
Why? It’s so innocuous and a bit funny. It doesn’t compromise on any aspect of the gameplay. Sure, they could have spent a little more effort to make the image fit the final fantasy theme, but companies get weird about how their image is used.
Which is also strange because you would think SE values their flagship franchise more. Like not sure Nissin were paying _that much_ even.