From my reading focused on this specific issue of the GDPR and the national laws of member states, this is not the case. Opt-in is specifically required for personal information. The telemetry data outlined in the proposal would not fall under this requirement. You can even retain time-limited IP logs with some special caveats. The GDPR is actually quite reasonable and fair.

Russ Cox is a very intelligent and effective engineer. He has a history of projects where he first analyses the problem space, then arrives at great solutions. He puts a lot of effort into discussing the problems and proposal with the community, especially after the widely criticized go mod decision by the go team (which is now mostly accepted as unfortunate, but in the end, the correct decision, I would think).

My point is: We all suspect Google and telemetry to be bad. But can we be charitable enough to separate the Go project, that is run by individual humans, and telemetry from our superficial cliches to actually read the proposal?