NATO is the greatest power projection project the in the history of the world, and is in no small part why the US has achieved hegemonic status. The ability for the US to wage wars on the opposite side of the globe without major logistical issues is greatly aided by NATO bases that are simultaneously in very friendly territory, and much closer to the action.
NATO membership also means NATO equipment, which the US's military-industrial complex disproportionate benefits from, but also serves as lock-in: those extremely expensive aircraft are basically scrap without the appropriate service contracts and part availability, meaning any military that aligns itself with the US's tech is far less likely to be able to wage wars we don't approve of.
NATO also brings stability: nuclear red-line borders are unlikely to be invaded, reducing the chances of conflicts that are bad for business. A peaceful world is a profitable world, and those profits disproportionately go to the US.
NATO also provides soft power projection: NATO membership is a huge boon to its members, which grants the US leverage politically to encourage member states to adopt pro-US policies.
NATO membership also means NATO equipment, which the US's military-industrial complex disproportionate benefits from, but also serves as lock-in: those extremely expensive aircraft are basically scrap without the appropriate service contracts and part availability, meaning any military that aligns itself with the US's tech is far less likely to be able to wage wars we don't approve of.
NATO also brings stability: nuclear red-line borders are unlikely to be invaded, reducing the chances of conflicts that are bad for business. A peaceful world is a profitable world, and those profits disproportionately go to the US.
NATO also provides soft power projection: NATO membership is a huge boon to its members, which grants the US leverage politically to encourage member states to adopt pro-US policies.