UK visa rules are now stupidly enforced as the IO try to cling on to the tiny bit of power they have left, as everyone else can see UK Home office is not fit for purpose.
So explain away how many of these illegal economic migrants come directly from there place of 'oppression' to the UK without passing through another country? Since airlines became financially responsible for any that arrived on flights, very very few, because almost none come originally from countries surrounding UK.
There are legal routes to apply to immigrate to UK, and for genuine asylum seekers to be placed by the UN but these economic migrants choose not to or are unable to qualify so ignore the law of the land even before they arrive.
Many don't even understand the USA they see in pictures is not the UK.
But you will want to believe facts are prejudice because they don't fit your narrative.
Most Americans don't speak English as America is a continent not a country. Most United Statiens are too dim to understand that so go for the easy option. 😀
As long as you apply with all the correct bits uploaded before you leave your home country the Evisa is sent to you as a pdf by email, which you show (on your phone) to the IO on arrival.