This sort of thing happens when the construction is controlled by a company who intends to maximise profit. Corners are cut, steel used is reduced, strength of concrete is reduced and all in the name of maximising profit.
https://in-cyprus.philenews.com/news/local/second-balcony-collapse-in-a-day-in-limassol-woman-in-hospital/?fbclid=IwAR09dzsLx3HmlGnr_X0-tz8LDL03Epl2pZWzLbO8Rq_AQA24Dn3QP8Ip8oo