Costa Rica beaches - honest opinion?

Trying to plan a first-time trip to CR as a family of 4 (kids 3, 5). We are definitely spending at least 4-5 nights in La Fortuna/Arenal area. Hoping not to offend anyone, but from photos, I haven’t really been impressed by the beaches. We’ve been to a lot of very beautiful beach destinations so I don’t want to allocate costs where we would enjoy them more somewhere else. When I think CR I envision more of the rainforest, wildlife, volcano experience, and that’s what we’re really looking forward to. But it seems most people stop at the beach as well. Is it truly worth a stop/drive over? Guanacaste was a possibility we considered. Any input is appreciated.

Author: Artistic_Walk_418