Iirc the reason why they don't bury the high-voltage transmission lines are:
- Heat dissipation because those lines get hot with all the power flowing through it.
- Following on from the above, the wires are uninsulated because finding an insulation material that doesn't melt gets very expensive.
- Harder to maintain because it's harder to pinpoint faults and any maintenance requires digging something up.
- Following on from the above, some dickhead not calling before digging and cutting into a high-voltage line is going to have a Very Bad Day.
It's up to you. I like levelling lots of alts so FFXIV allowing me to have everything on one character is great. I do encourage trying out different roles so you get a feel of what they're capable of.