“Locking people in for cash” is a common business practice in tech and other industries. Try mounting a Nikon lens on a Canon camera, for example. You might not like it, but I’m not sure why Apple deserves special condemnation in this regard.
You can simply buy the adapter from amazon or almost any shop. You've really chosen a bad example because companies have tried to patent their connectors to limit production of these kinds of adapters and the courts always rule the patents invalid. Locking people in for cash is a common illegal practice; it happens and take time to remediate, but is and should be illegal.
Not if you want to use autofocus.
...yes. Of course we should protect the personal transportation of hundreds of millions of Americans. And we do via the Magnuson-Moss Warranty Act.
In the same way, of course we should protect the primary form factor of personal computer for roughly a hundred of million Americans.
Right, I don't. Things like these not being standardized when it would be so easy for them to be just so that one provider can make a little extra money selling their own peripherals is scummy and I would love to see it stopped. Apple does this, Nikon does this, both can either fix it or burn.
Also, what exactly is your point? That you admit Apple is doing anti-competitive things to lock customers in, just that you don't care?