Because it fundamentally destroys the current agenda within software development, that tools should be created for developer satisfaction, not customer satisfaction.
Am I the only one scratching their head at this argument in 2020? 15 years ago when shared hosting was more common I would buy it, but I just don't find myself wasting time on figuring deployments out in other languages/frameworks. By far the biggest time sink in that area is setting up continuous integration and monitoring/alerting systems, and those problems are exactly the same regardless of language.
That's a very big If in PHP's case.