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There will be no danger, but after a while, the ceiling will be deformed, and the plasterboard joints will crack.
The ceiling opening is only 5 cm, and spotlights can be installed.
Now there is a kind of open-hole drill bit that is a complete set, and there are no big ones, and if they are small, they will be larger.
Positioning according to human habits. 35 cm from the wall. The place with the sofa is in the middle of the tea table. Others are divided equally by distance.
Generally, the ceiling downlight holes are handed over to electricians, who know where to place the wire. Opening this hole is charged on a per-one basis, mainly depending on whether you have paid the fee before to clearly include this.
The painter will not crack if he handles it properly.