It's a bit of a rough start for new users one way or the other. If all they have access to are free relays, then they will see a lot of spam early on that could cause them to just give up, especially if the spam is the only engagement they get.
Discussion
Yes, some will give up but there's always that one or two that will stay. Exactly how Bitcoin was at the beginning. Some people give up fast and others quickly see the value in something.
but many of us on nostr know that nostr is the next big thing since Bitcoin. The giver up-ers will eventually come back.