When 90% of the plugins and tutorials are available for proprietary software it’s hard to support blender. It also doesn’t help that the UI of the blender is extremely hostile for new users. When other tools are easier to use and have better tooling it’s hard to justify the usage of blender.
https://www.blender.org/2-8/#user-interface
They’re also finally switching the default to left click select. Having to select with right click was one of the big things that made the UI feel really alien for anyone who hasn’t used it a lot.