[jarfil]

A surface mounted switch and a tiny hole in the casing would be easy and cheap... but it would ruin waterproofing, which would make the bulb unsuitable for places like a bathroom. That's probably too big of a market to lose just to simplify a reset procedure that will rarely be used.

[kalleboo]

The hole method become a problem when your only fixtures are embedded/in the ceiling and you can’t reach it.

Some people will end up using a metal hairpin... next to an live, exposed Edison socket

Some LED lights also get quite warm