No it isn't that's a ridiculous position to take. Also every Google phone for the last decade has had an unlockable bootloader. Take it up with Samsung if they refuse to do the same, although a quick internet search suggests many of the recent generations of Samsung devices also have unlockable bootloaders.
Samsung locks all of their bootloaders citing as always 'security.
I own currently the Samsung s20+ and the Samsung s21 ultra and all the models of both phones have locked bootloaders and Samsung's garbage, unused Knox security. Samsung at one point had a hardware fuse that blew if you tried to bypass it.
I speak from first hand knowledge of working on hardware and rooting phones since they were introduced.
We've known for a decade or more now that was all of this was bullshit to preserve all the pre-loaded bloatware.
Google phones having unlocked bootloaders is besides the point. Google phones aren't being discussed here, Samsung are.
You simply stated my position was ridiculous without offering a single cogent counterpoint.
The lockdown in the US seems to be driven by carriers
Why do people keep trying to derail the conversation. This is about the US market.
It's not beside the point when your initial claim was that Google was the reason for locked Samsung bootloaders. But if that were the case, why would their own phones be unlocked?
Samsung gets to have it both ways. They get paid by google to force their apps, and then Samsung can force whatever shovelware they want under the huise of 'security'