And ? This is the UK not abroad. There are reasons way beyond your understanding why devices are fitted with a compliant plug and fuse, but I will try to enlighten you, one being it was deemed necessary to improve safety and secondly the fuse was and still is there to protect the rest of the circuit in a worse case scenario, ignoring discrimination for the time being because you are talking about an unfused plug, you do realise that a 6A lighting circuit is protected by a 6A protective device that can have a trip current between 3 and 5 times the rated current, correct ? More so on older installations, you can look this data up if you care to.
Now when I went to school we learnt that 3 times 6 is 18, so its possible that is a device connected to 6A circuit develops a fault, for a very short time it could draw up to 18A minimum, it may be for a very short time but even so its possible the cable and the device itself could ignite, would you want that possibility in your home, in your own attic ? it is a small risk and rarely occurs but when it does, its often devastating and sometimes fatal. If you care to spend some time researching this and finding real world examples you may learn something and finally realise why we have or supposed to have standards to try to negate this.
