If you travel by train in the UK you'll soon realise how many stations are in fact in open countryside or between housing estates

No, these are very much for rural applications, hence why they don't need to include any provision for ramps or lifts (which most new crossings must), given the paths they connect are themselves typically at best a mud track (and often just a scarcely marked crossing of grazing land).

Nobody here understands this lol. They either haven’t been to the UK or haven’t been outside London.

Eh, unless you spend much time walking in parts of the UK anywhere near a train line, it's not too hard to be totally unaware of such bridges (or even just footpath level crossings).

Also very few level crossings due to a live 3rd rail on many lines. Crossing tracks safely and legally can be a many mile detour.

only a relatively small percentage of the UK network is electrified using a third rail (it is essentially a deprecated technology)

regardless, level crossings work perfectly well: they simply have a gap in the electrified rail over the crossing (and the train is longer than the gap)

if you look closely here you can see it: https://www.networkrail.co.uk/wp-content/uploads/2020/07/Ash...