If you choose php, I will assume that you.
1. Either is not aware of that php has a million gotchas that you need to avoid at every step. Take a look at the ever growing (!) list at /r/lolphp.
2. You don't see the significance of the aforementioned gotchas. For eg, you can show things like php's registerglobals to a newbie, and he will be impressed by how convenient it is. He won't see how bad it actually can be. This is not because he is a "lesser programmer", but due to a case of "unknown unknowns". Note that you can have 10 years of PHP experience and can still be like this.
> Also modern PHP really isn't like old PHP, composer, PSR's, The FIG....
These things does make a difference. But only on the surface, not deep down where it is really rotten.