There's a simple conflict of interest here: with a game that big, you can install fewer games. You don't want to uninstall it since it's so big, and sometimes your friends want to play it. So you keep it installed and play it more often.
There’s nothing stopping manufacturers from permanently locking the bootloader. Some do and others don’t suggesting that the industry does not have a universal preference.
Some manufacturers have stopped allowing unlocking their bootloaders, some bootloaders have been hacked by the community. It's not like this is a static system.
I do think Google wants it to be inconvenient enough to run a version of Android they haven’t blessed as one’s main phone that it has no chance to become mainstream, but that’s about the prospect of an OEM not bundling Google’s apps and store, not hobbyists running custom builds.
No, Google is also trying to stop hobbyists running custom builds from accessing services built on their software (the aforementioned SafetyNet). Hackers keep finding ways around this, but Google keeps trying to lock them out.
A single water molecule cannot physically touch enough other water molecules for them to be considered liquid. It can touch water molecules which touch other water molecules, in aggregate making them a liquid, but that makes the water molecule itself part of the liquid, which means it cannot be wet.
Yours too of course 😘