The specific example here - pushing an organization to use your bespoke Python framework, that you believe to be the best solution for all Python programming tasks - does not inspire confidence.
Can you be more specific, confidence with what exactly? :)
I'm interpreting your reaction to the thought that "if it's so good, why doesn't it sell itself?" -- in which case I would suggest you put yourself in the shoes of someone on a platform team, or a manager trying to get everyone to do things a certain way, and they'll explain that for brand new greenfield things, adoption is generally much easier, but for existing people and processes change is difficult - so even with a better solution it just doesn't sell it self without some help.
Sometimes the people involved have to be ... exchanged for other people. I've probably been that person at times and seen others needing to move on for the benefit of everyone. Yet staying in the familiar can be deceptively comfortable.
