Agreed. I was previously a founder with a company in an incubator in which we were able to negotiate the terms of the deal. One founder spent 3 months basically trying to negotiate the terms and at the end we didn't take that funding and it was like lighting 3 months of time of fire on equity discussions that didn't matter if we weren't successful. If you only have 2-3 founders, it's a major distraction/waste of time up front when you really need to be taking advantages of whatever the incubator provides (connections, mentorship, pilots, etc.) and executing. If there are no advantages, don't join the incubator. If you don't want to take VC funding, you probably shouldn't join an incubator/accelerator since VC connections are usually the few consistent things the incubator can provide.