In the UK (not an insurance-based system), many GPs ("family doctors") will aim to take a BP reading if there is time. This is partly because there is a system called the Quality Outcome Framework that incentivises practices to do so, but the route of it is that those incentives are in place because high blood pressure is extremely common, under-diagnosed, and has huge health consequences if left untreated, which in turn is extremely expensive for a national health service. A BP check is quick, simple, and cheap, and can help to identify problems early on when simpler interventions can stave off bad outcomes.