My second snap ;-)

[Mark Shuttleworth]

Giving you your own /etc would enable you to do whatever you want in it,
but it would by definition also mean that any files you see there don't
reflect any OTHER apps understanding. So /etc/resolv.conf for example
would be meaningless, because yours might be different to that on the
snap next door.

It's hard to know in advance if your snap wants to READ stuff in /etc/
that is written by others, or WRITE stuff in /etc/ that is mainly used
by itself.

Mark