Vendor lock-in from a service provider is different from vendor lock-in from using proprietary software.
If you’re dumb enough to not host your shit locally and instead rely on Amazon, that’s literally your own shortsightedness that led to vendor lock in.
The first mistake anyone made was thinking putting their whole business on some other businesses private property was a good idea. Pro-tip: it’s not.
In other words, I already agree with you, but I think vendor lock-in for services is a vaslty different issue than vendor lock-in for proprietary software.
You could always just go as “End User” which is just a name tag and introduce yourself by quoting Taylor Swift (like the average end user):
“It’s me. Hi, I’m the problem, it’s me.”
Sly reference to PEBCAK.