See https://github.com/open-telemetry/opentelemetry-specification/blob/1729bc4337bdc1df83ff7eab53eb7405d6e75665/specification/trace/sdk.md#sampling

Sampling may be implemented on different stages of a trace collection. OpenTelemetry API defines a Sampler interface that can be used at instrumentation points by libraries to check the SamplingResult early and optimize the amount of telemetry that needs to be collected.

This is wrong, since samplers are an SDK concept and thus cannot (or at least should not) be used by instrumentations. Also, there is no mention of the TracerProvider having a sampler asssociated with it, or the tracer automatically checking the sampler when starting a span.