It cracks me up to hear "NO, it can NOT be replaced because it is S-O-L-D-E-R-E-D to the board!!!"... as if that's some nightmare scenario.
🎵Dunn... Dunnn... Duuunnnnnnnnn.....🎶
No one gave birth to a motherboard that came out with every component already attached. It had to first be soldered on, which means it can also be DE-soldered, which in turn means it can then be RE-soldered! While YOU may not be able to solder/de-solder components, that doesn't mean it's an impossibility for everyone. I've been fixing devices for friends/family, creating electronic projects, and doodling with various PCB's for a couple of years now and I could easily replace the "impossible to replace" RAM, all while possessing only a "self-taught, hands-on" education in electronics.
Bottom line: If a component is soldered to a pcb, then it can be replaced.