If that is the only club within striking distance, and they are a serious club, might not be a good fit for someone doing it "just" for fun. I would not assume though.
I go to club about 3 times a month (2 different clubs at this point because I would like to level up as the kids say). To supplement I work on stuff at home most days. At home anywhere from 10 minutes here and there to a solid 2 hours. Just depends. But yeah, club most weekends and a block of training everyday.
My one club is beginner friendly and a great place for people to learn. I'll be happy to get all 80s when I do IPO end of year, but that is the level I'm able to put training/putting in the time for. Maybe I'll be surprised by 90s in protection. Hopefully we don't do something wonky and get DQd. If we do, there is always next trial. With the next puppy I'd like to be a bit more serious. We will see.
To really answer your question of does anyone do it JUST for fun..yes, for sure. I know some that I train with at one place. No intentions of using their dogs titles for breeding, no intentions or time to travel to Nationals and such. Sounds like the place near you is more serious. If you go someplace where people have the intentions of going to serious competitions and winning things, I can see them not wanting to sit through people who are just there for fun and don't want to put time sweat and money into it. And that is fine too. It can be a long day, the more people, the longer between your turns working your dog. So I can understand why people with hard defined club goals will be upfront about the level of commitment they expect and want a community of people with similar goals. I would expect you to be welcome if you were serious about working your dog and having fun even if you were not going for trophies...but I would be annoyed if someone took up helper and field time and was obviously just showing up week to week without doing a blessed thing on their own in between. But who does that and pays to go to a club? I'm asking as I've yet to see someone like that in my short time involved
Good luck, hope you find something that works for you and your dog. There is a lot out there! Maybe give this club a chance, and find out what they mean by their description of what they expect. I imagine the majority of people who are into IPO also have careers, family obligations. Call them and go check it out one day without your dog I say. What are they going to do, beat you up? You may be pleasantly surprised and they may be able to expand of this non fun thing they are describing
Maybe they eliminate the unworthy at the front line of the phone call lol Only the truly dedicated will call back and ask to watch a club day...