There’s a fine line or at least some subtlety here though. This leads to some interesting conversations when people notice how hard I push back against NIH. You don’t have to be the author to understand and be able to fiddle with tool internals. In a pinch you can tinker with things you run yourself.
There are also advantages to being part of the herd.
When you are hosted at some non-cloud data center, and they have a problem that takes them offline, your customers notice.
When you are hosted at a giant cloud provider, and they have a problem that takes them offline, your customers might not even notice because your business is just one of dozens of businesses and services they use that aren't working for them.