You are right. Interesting. An option to turn the caching service off would be definitely fair. Hey nostr:nprofile1qqs9xtvrphl7p8qnua0gk9zusft33lqjkqqr7cwkr6g8wusu0lle8jcpzemhxue69uhhyetvv9ujuurjd9kk...
They've been asked that a million times & they aren't interested. You could try LibreNostr which is a fork of Primal with that option