https://ios.gadgethacks.com/how-to/siri-101-use-hey-siri-han...
The only time thst I need to be able to activate Siri hands free is when I am driving. Even my cheap car has Bluetooth with a button on the steering wheel that activates it. It’s much more reliable than Hey Siri for me.
And yes, you use Siri hands free so rarely because it doesn't work (as you acknowledged). That's not the case with Google Assistant which works really great for most people - and I use it extensively (almost all day) - both with my phone and Google Home.
But that aside from duplicate apps, my 2nd more important point was SECURITY. An iphone user w/ phone from 2013 can still feel confident that his phone is secure , an android user from 2013 is laughably insecure.
If you use your phone for any work related sensitive data , and android phone is a huge gamble.