Interesting, I had the opposite idea. I come from doing B2C product and now work at a B2B SaaS company and my first thought was that B2B is so much harder to crack because existing solutions are really feature complete and clients are not going to tolerate for your service to have quirks or errors.
I guess B2B and B2C are not that much different regarding user tolerance and it just comes down to how much unique value is your solution giving to the customer.
This is probably just a lack of familiarity with the playbook for selling B2B. People that have been doing it a long time can intuitively navigate around these obvious objections.
Outside of some rare cases, there are standard positioning techniques to avoid being evaluated for completeness relative to whatever the business has. For example, not positioning your product as a replacement for existing products -- "and" not "or" -- is an effective approach. Trying to be a feature for feature clone of an existing product they already use is a losing proposition, so having a strategy to reframe the discussion away from that perspective is a requirement.
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